What Dancer really needs right now:

-The ability to cap its JA haste (Haste Samba II can give 25 JA Haste for example, or even fix the original one to give 25)
-The ability to increase its horrible attack % or at least STR % (can easily add this to Saber Dance).
-Dazes should be faster to cap, as a Dancer main it makes sense that each step gives 2 levels to Daze and 3 with Presto instead of 1 and 2 (waiting 30 s on Presto -is counterproductive when you can spam 6 steps in that window).
-Really no point whatsoever in current game for Saber/Fan to have decay... I mean fights take what 3-7 min tops? (at least start decay past 3 min window)
-Healing Waltz should be AoE or at least lower the timer of Contradance to 15-30s instead of 5 min...
-An AoE Raise/Reraise Dance can be something special to add to Dancer.
-Wild Flourish needs to gain access to higher tier skill chains.. (you can increase steps needed for higher tiers).
-Regain trait given when you use Grand Pas.