Having fewer buttons to press is a plus in my view. And I've been playing XIV since 1.0.
The idea that more buttons = more complex has always been such a ooga-booga take. 4 or 5 is too little though.

Anyway I wouldn't move over. Mobile gaming is garbage. And I haven't owned a house in over 4 years. Let mine go and never looked back. Not worth being forced to sub every other month over.