It would be nice if grid could load edit and create forms from server side by get request.and then save them by post request. it would be much more easier if  some fields in edit/create form could be saved without  loading in grid. 
And also there would be much better control on load data if it is possible to check some conditions in edit form through server.
At the end I suggest to change grid widget to:
@(Html.Kendo().Grid<Model>()
  .DataSource(ds => ds
    .Ajax()
    .Read(r => r.Action("FillGrid", "Controller"))
    .GetCreateForm(c => c.Action("Create", "Controller", "Get"))
    .Create(c => c.Action("Create", "Controller", "Post"))
    .GetEditForm(u => u.Action("Edit", "Controller", "Get"))
    .Update(u => u.Action("Edit", "Controller", "Post"))
)