One thing that is annoying me is this topic is the argument :
"I did a really unique moveset for him/her".
No one ever should doubt this. A characther MUST be too bad for a supporter don't make him a unique moveset.
Sakurai does for R.O.B with the simple fact that he is a robot and taking 3 or 4 references from him as a acessory;
In the end, all what matter is "Sakurai moveset".And he's showing progress from the last games (Villager and Rosalina are great exemples).
I could make a decent moveset for Rolf, my favorite archer from FE and I really think another zoner
(spam) character should be fun, good to frustrate some players.
But I will never claim Rolf's chances.
From this , Lucina and Chrom could have a nice moveset.
But are them good choices ? I don't think so.
Sothe (Sakurai apparently likes him) , Micaiah, Robin (with sword and magic), Hector (while I don't like him) and even Soren has more potential as a different FE REPRESENTATION.
Again, the character representation (and I agree with the "hot character" stuff) is what matters.
Moveset (I understand your hobby but...) is Sakurai job.