My thoughts on the Beta so far:
Would it kill them to at least let you change the Jump button to anything besides Circle? I'm still not used to this layout, though I tweaked the Guard/Evade and Dash triggers so they're on my Right Hand.
Cecil's Dark Knight Mode got BUFFED from Duodecim. He's awesome.
Neutral Triangle EX is "Limit Break", as I did Lightning's Army of One, still trying others.
You only get ONE 1 HP Attack now per moveset, but I hope that changes as you Level up. Haven't seen any Brave to HP chains yet either.
Still haven't figured out Lightning's Paradigm Shift input if she has it anymore.
Summon Tutorial is the best area to test all your moves, and if you follow the clear requirements out of order, you can see what your Summon does, though I don't think Summons do HP attacks, or I didn't see any.
Core Battle is harder than it looks, so best try it in Multiplayer rather than Single.
No way to completely "Lock off" any target unless your Target is respawning, too bad, as I liked Free Camera.