Like idk, when overwatch came out, it was an absolute blast. I wasn't looking forward to it at all, i didn't care for it a bit until i played it. It just got run into the ground slowly. Also they made team fortress 2 way WAY before, and yeah that's what they excites them.
Valve's game development division feels more like a weird cult than a proper game company. I don't think they get "excited" for the things that most people get excited for. (Remember when they were excited for a virtual card game where you have to pay for every card?) The Valve of the 2000s is long gone IMO