It's just a requirement they added to prevent older devices from installing the game.
Is there a reason they would do that? As far as I can tell, isn't that only hurting their business? Or is there something I don't know about payments on old devices?
I am enjoying myself. I find the new additions and gameplay changes to be very refreshing, despite having been concerned about it.
This may be premature to ask considering I don't know where you are in the story but which system do you prefer (not taking into account screen size because iPhone and iPad vastly differ in that category but they are still the same game).