Deuce is useful as an attack character too, since her normal attacks are magical and non-elemental, so they usually deal a lot of damage to almost any enemy.
As for the AI. The normal AI for your team is not very useful (if they include Academy Backup that is ten times better), the enemies are very standard enemies (nothing too good, nothing too bad), some bosses are actually pretty tough though.
The problem is that every thread about this game is nothing but that. You have the people going "Not paying full price, fuck you SE.", "Should have been Vita", etc.
And I know for sure that the OT will be just people who bought it for the demo and will hate Type-0 itself because it plays like the handheld game it is.
Well yeah, that's what it always was.
It's not a remake...