I've also been seeing other artists in the pool now for the soundtrack. I guess they want to broaden it a bit.
During Crimefest they had another "guest artist" Le Castle Vania with, for example,
"Infinite Ammo"The earlier guest artist being also Alesso of course... Who had an entire heist dedicated to him. >_<
I think there was another one? I am not sure though.
Either way, i don't think this is a bad thing, especially since we can select our music in-game ourselves anyway.
At least there is now more and more variety for the player.