_KermitYeah but as they are all comp players (like 99% of the people on this site), why would anyone really care about mann power, MvM, robot destruction, Passtime or whatever player destruction is.
I'm not saying they are required, but imo if you want to deliver a fully functioning hud, that keeps working after the contest has ended, can be downloaded by the masses and has a consistent overall look adding support for nice gamemodes might be nice to put some effort in.
The list I suggested is not the official required list of elements that need to be modified, it's just a general one you can use as a checklist when creating/modifying one, without specifying the menu/store/lobby/backpack elements, which could also be a thing for another contest.
And do not hate on MvM, that shit is legit and the default hud is disgusting to use there, please modify this when creating a custom HUD (you kinda have to when you mess with the scoreboard ;))