Curious since you brought it up, does deathwing still assume a human form like the others? "neltharion" in this regard i guess. Or is he perma dragon? lol, i see alexstrasa, chromie, even nefarion etc etc all have their "human" forms. although im not really sure behind the lore, perhaps they merely transform as to not scare human's too much lol, i dunno but yeah.
Cuz i envision (and yeah getting ahead of myself i know lol) The first phase of DW being a "human form dw" with a tanky spanky + adds or whatever going on, then a second phase of dw in dragon form, and the other Dragon aspects chromie, alex etc etc etc, showing up for phase 2 and helping us out, meanwhile were doing something too lol.
i must admit i like the idea of other aspects showing up in the fight, in terms of everything, it makes sense, they want him dead and really its just stupid if its a "get on drakes" lets pew pew fight, in terms of lore there should be some serious backup, e/g aspects not a farking ony fight lol. but yeah thats just me