Thanks for your feedback. We are considering how we embed forms from different platforms in other locations, so we are also considering how we would embed New Responsive forms in Office365.
I have two issues submitted that are related to form latency. When they reviewed the form, they told me it was very large and had many rules. Currently, there are 247 rules, with about 25 of them disabled. So Nintex states,
" I will like to point out that this specific SharePoint List is extremely large and the Nintex Forms as well. To start, you have more List Lockups than normal. This will cause problems with the threshold."
Then they go on to list out all the columns and send me a URL related to Microsoft list view threshold error. I am not sure what the list view has to do with a slow, very slow, loading form. the list view loads fine, the forms, without Nintex, load fine.
i have several requests for a multi-page form. and everyone loves the new responsive design. but these two things don't work together. We wish for the ability to place a "submit" button onto the bottom of each page in a responsive design. this would then allow emails or tasks to go, depending on which button was clicked or even which new fields were completed.