I see no reason why they shouldn't do this. I support this.
What I think would be nice is if each mode got it's own. Like TT would be more of a dark blue, where Howling Abyss would be an orange-ish brown.
I'm glad to see loading screen changes.
Though the loading screen has always seemed really bland to me.
then again, it is a loading screen.
I have no idea what twisted treelines or crystal scars are, so no. No time wasted on those silly things.
They might already have them, but nobody's noticed because no one likes TT or Dominion.
Would also love if they added new draft and blind pick music for Twisted Treeline. Wont add anything for Dominion just yet, that map needs to be Visually Updated anyways.
Riot only seams to care about Summoners rift this season so far. Honestly both the other maps could use full updates like summoners, but i dont think it will happen till next year at the earliest, much less loading screen splashes. ;(