Maybe 2 or 3 days for stages? I don't want to spend too long with them.
As for undertuned moves, there are a lot more:
F-tilt is so underwhelming compared to the rest of her moveset. Decent damage, but terribly laggy and doesn't combo or kill.
D-tilt needs to have a reason to use over F-tilt. Less end lag, maybe?
F-tilt is entirely outclassed. I feel like it should launch more horizontally to distinguish it from the more useful D- and U-tilts.
Jet Hammer desperately needs no self damage and less lag.
F-tilt needs less end lag to make up for it being weaker than Pit's, otherwise it has little to no use.
Why does Giant Punch put him into freefall, again?
Duck Jump is easily the worst flying recovery. Decent distance, but no hitboxes, uncancelable, and travels pitifully slow.
Fire Bird is entirely outclassed by Fox's up-B. It should have more knockback than Fox's like in previous games, which would make up for it going shorter and having less mobility afterward.
His Up-B should be more powerful than Falcon's to make up for it being slower and having less horizontal distance.
Of all her moves, Rollout and Sing need huge buffs to be useful. Rollout should charge faster and not put you into a freefall-esque state after landing it in the air, and Sing should knock away aerial fighters, not trigger counters, and have less end lag.
U-air has literally no practical use. At least his other aerials have something they can somewhat do...
Extreme Speed needs less landing lag and less bounce back when hitting a wall (like Greninja's buff).
/
Why do their neutral B's put them into freefall, again?
/
D-air needs to have less end lag or always spike. The risk/reward is currently too skewed to the left ATM.
F-tilt should come out more quickly. It is currently outclassed by most of his other moves.
Grab. Need I say more? Also, fix D-air like MrGameguycolor suggested.
Increase knockback of F-tilt, have Autoreticle stay locked onto its target, and increase knockback of counter. Speaking of...
Increase knockback of counter, and make F-tilt either kill better or combo better.
Make jabs connect reliably, and decrease end lag of F-tilt.
Increase duration of U- and D-air so they match the giant laser-sword that stays out for a while.
Make F-smash more powerful or just generally better.
Egg Roll should travel faster and have less end lag.
Din's Fire. Why does it take so long to come out and put her into free fall?