Excuse my double post, but, this is necessary. I just tested her Usmash on a couple of characters, let me give you the rundown on each:
Mario - 45% - 3 Usmashes are possible - a Uair is possible right after depending on DI which would make it a 60% combo.
DK - 45% - 3 Usmashes are possible - a Uair is also possible bringing DK up to 60% (again DI dependent)
DDD - 45% - 3 Usmashes guaranteed - a Uair is almost guaranteed right after giving him 60% (might be DI dependent as well)
Snake - 45% - 3 Usmashes are possible - a Uair is possible right after for 60% easy (DI dependent)
Jigglypuff - 30% - 2 Usmashes are guaranteed - Uair is possible right after for 45% (DI dependent)
Wario - 45% - 3 Usmashes are possible - a Uair is almost guaranteed right after for 60% (DI dependent)
Bowser - 45% - 4-5 Usmashes are possible (had he not had Thick Skin, this would be HORRIBLE for Bowser) - a Uair is guaranteed right after depending on if you do it after the 4th or 5th time, 5th time might not be possible to do a Uair (unsure of)
Fox - 45% - 3 Usmashes almost guaranteed - Uair is also again possible after the 3rd Usmash (DI dependent).
Falco - 45% - 3 Usmashes guaranteed (weight difference from Fox makes the third Usmash possible) - Uair right after, DI dependent.
And there were a few other characters I tested that yielded roughly the same results, three Usmashes, and she doesn't even HAVE to MOVE for some of them. But, this testing WAS done in Training mode on a standing CPU just to see how many Usmashes are possible, DI really wasn't what I wanted to look at. You can try and get some testing going with DI accounted but, I lack a person here to do that part atm. But as you can see, three Usmashes seems to be the most she can do on every character, which is an easy 45%, it's as dumb as Fox's Utilt (which is actually DI'able and able to be escaped, while Zelda's isn't). And if it is DI dependent for the third Usmash, it's still an easy 30%, which I don't think should happen anyway. Nobody else's smash attacks combo into themselves, why should hers? :S
In any case, there are my results. Her Usmash does 15% each time it hits, a few times the CPU DI'd a few of the hits, which brought them to 43% but nothing major changed in all the times I tested it. Overall, it's a pretty dumb move.
Also, I find it extremely hard to actually try and sweetspot Zelda's Dair onstage, I think it should be tweaked slightly but not enough to make it EASY like Ganon or Ness, just to make it actually intentional to do.