As a new OF for iPad user, in my first few hours I'm thinking it takes too many clicks to quick enter something. If I'm in a list, the + up top requires that I click again to confirm that i want a new action in this project. I think the quick entry icon should be separate.
If you are looking at a specific project and want to add an action, even faster than using the Quick Entry option is to tap and hold on the project's top bar (where the name and remaining action count and collapse/expand triangle are) then choose New Action from the popup. No need to fill in the project, unlike with Quick Entry. If you anticipate adding more than one, you can similarly focus on the project, so that the first item in the + list is to add a New Action in the current project.
As always, if you want to make a feature request, you need to email it to Omni, not post it on the forum. Help->Send Feedback in the Mac application, or Contact Omni under the gear menu for the iPad app.