diff --git a/docs/reference/react/useForm.md b/docs/reference/react/useForm.md
index c3a30c2..75323e8 100644
--- a/docs/reference/react/useForm.md
+++ b/docs/reference/react/useForm.md
@@ -12,7 +12,7 @@ declare function useForm<
   TData,
   TAdapter extends ValidatorAdapter | undefined = undefined,
 >(
-  options: FormLogicOptions<TData, TAdapter>,
+  options?: FormLogicOptions<TData, TAdapter>,
 ): FormContextType<TData, TAdapter>;
 ```
 
diff --git a/packages/form-core/src/FormLogic.spec.ts b/packages/form-core/src/FormLogic.spec.ts
index ee0994c..8a4aba4 100644
--- a/packages/form-core/src/FormLogic.spec.ts
+++ b/packages/form-core/src/FormLogic.spec.ts
@@ -42,9 +42,12 @@ const adapter: ValidatorAdapter = {
 describe('FormLogic', () => {
   it('should have the correct initial state', () => {
     const form = new FormLogic()
+
+    expect(form.isMounted.value).toBeFalsy()
     form.mount()
+    expect(form.isMounted.value).toBeTruthy()
 
-    expect(form.fields.peek().length).toBe(0)
+    expect(form.fields.value.length).toBe(0)
 
     expect(form.data.value).toStrictEqual({})
     expect(form.json.value).toStrictEqual({})
@@ -470,6 +473,42 @@ describe('FormLogic', () => {
       form.updateOptions({ defaultValues: { name: 'another' } })
       expect(form.data.value.name.value).toBe('another')
     })
+    it('should be able to remove fields of dynamic objects or items from an array when updating the options', () => {
+      const form = new FormLogic<{
+        obj: { [key: string]: string }
+        array: number[]
+      }>({
+        defaultValues: {
+          obj: {
+            stay: 'stay',
+            go: 'go',
+          },
+          array: [1, 2, 3],
+        },
+      })
+      form.mount()
+
+      expect(form.json.value).toEqual({
+        obj: {
+          stay: 'stay',
+          go: 'go',
+        },
+        array: [1, 2, 3],
+      })
+      form.updateOptions({
+        defaultValues: {
+          obj: { stay: 'stay(changed)', new: 'new' },
+          array: [2],
+        },
+      })
+      expect(form.json.value).toEqual({
+        obj: {
+          stay: 'stay(changed)',
+          new: 'new',
+        },
+        array: [2],
+      })
+    })
 
     it('should update the data when using the handleChange method', () => {
       const form = new FormLogic<{ name: string }>()
@@ -1804,6 +1843,22 @@ describe('FormLogic', () => {
         expect(form.data.value.deep.value.new.value).toBe(2)
         expect(fn).toHaveBeenCalledTimes(1)
       })
+      it('should touch a field when adding a new key to an object if configured', () => {
+        const form = new FormLogic<{ deep: { [key: string]: number } }>({
+          defaultValues: {
+            deep: {
+              value: 1,
+            },
+          },
+        })
+        form.mount()
+        const field = new FieldLogic(form, 'deep')
+        field.mount()
+
+        expect(field.isTouched.value).toBe(false)
+        form.setValueInObject('deep', 'new', 2, { shouldTouch: true })
+        expect(field.isTouched.value).toBe(true)
+      })
       it('should update a value in an object that already has the key', () => {
         const form = new FormLogic<{ deep: { [key: string]: number } }>({
           defaultValues: {
@@ -1881,6 +1936,22 @@ describe('FormLogic', () => {
         expect(form.data.value.deep.value.value).toBeUndefined()
         expect(fn).toHaveBeenCalledTimes(1)
       })
+      it('should touch a field when removing a key from an object if configured', () => {
+        const form = new FormLogic<{ deep: { value?: number } }>({
+          defaultValues: {
+            deep: {
+              value: 1,
+            },
+          },
+        })
+        form.mount()
+        const field = new FieldLogic(form, 'deep')
+        field.mount()
+
+        expect(field.isTouched.value).toBe(false)
+        form.removeValueInObject('deep', 'value', { shouldTouch: true })
+        expect(field.isTouched.value).toBe(true)
+      })
       it('should do nothing when trying to remove a key to a value that is not an object or a date', () => {
         const form = new FormLogic({
           defaultValues: {
diff --git a/packages/form-core/src/FormLogic.ts b/packages/form-core/src/FormLogic.ts
index 1de9e22..483c3c3 100644
--- a/packages/form-core/src/FormLogic.ts
+++ b/packages/form-core/src/FormLogic.ts
@@ -27,7 +27,6 @@ import {
   isEqualDeep,
   makeArrayEntry,
   removeSignalValueAtPath,
-  removeValueAtPath,
   setSignalValueAtPath,
   setSignalValuesFromObject,
   setValueAtPath,
@@ -394,9 +393,9 @@ export class FormLogic<
     // We do not want to update dirty field values, since we do not want to reset the form, but just override the default values
     const newDefaultValues = { ...options.defaultValues }
     for (const dirtyField of dirtyFields) {
-      removeValueAtPath(newDefaultValues, dirtyField as never)
+      setValueAtPath(newDefaultValues, dirtyField as never, undefined)
     }
-    setSignalValuesFromObject(this._data, newDefaultValues, true)
+    setSignalValuesFromObject(this._data, newDefaultValues)
   }
 
   /**
diff --git a/packages/form-react/src/form/form.hooks.tsx b/packages/form-react/src/form/form.hooks.tsx
index 0539941..646772c 100644
--- a/packages/form-react/src/form/form.hooks.tsx
+++ b/packages/form-react/src/form/form.hooks.tsx
@@ -22,7 +22,7 @@ export function useForm<
   TData,
   TAdapter extends ValidatorAdapter | undefined = undefined,
 >(
-  options: FormLogicOptions<TData, TAdapter>,
+  options?: FormLogicOptions<TData, TAdapter>,
 ): FormContextType<TData, TAdapter> {
   // biome-ignore lint/correctness/useExhaustiveDependencies: We only ever want to create a form once
   const finalForm = React.useMemo(() => {