I tend to use my iPad more for large controller templates where I want to know what everything is. TouchOSC is excellent for this, but also Drambo if you want to be able to save and recall states.
My UC4 and EC4 are for live performance where physical controls really matter. I’m leaning more towards those live setups all being on the same page, because when I try to setup a ton of controls I just get overwhelmed when trying to react quickly.