General advise and critique needed on UI ionic development

I have been tasked with taking an existing angular app and ionizing it. Lets say the app is already mobile friendly and responsive , i.e. extensive css and jquery transformations to make sure it rocks on little screens.

I know one of ionic 4 claim to fame is all it’s components that are responsive and mimic the look and feel of the hosting os, ios or android. What if I don’t care about that and feel the look of the angular html is just fine?

Would there be a problem just using the minimum oinc framework and leaving all the UI in html?

I wouldn’t say there would be a problem, but I also don’t think you would see a whole lot of benefit from using Ionic (as opposed to just “cordova-izing” the app instead).