It makes it so much harder to have to create an entirely new form whenever I have to add one to a page. Although, there are times when we might use the same form for different pages, there are still other elements we might want to differ on different pages such as button color, form color, text, etc.
ClickFunnels currently has the option where within the page editor you can just add an input, and in the page editor, add what type of input it is for each, add a button, and assign that to submit the form. This would be an essential thing to add in GHL.
It's great to have separate forms that you can create to embed elsewhere but it makes for some much extra work when working inside of the page editor.