My main concern with this is if it is going to have a clear identity or not. We only know leaks so far so it's not fair for me to judge anything yet. But from what I have read I suspect this game will try to be too many different things and nothing to everyone.
For example - I value mechanical movement/aiming skill above all else, things you see in CS, quake, TF2 (competitive shooters for grown ups). Is this game going to appeal to me? Or is it for the moba fans who value strategy, copying meta builds and having a spell do most of the mechanical work for you beyond basic micro/positioning/teamwork. From my experience games that try to combine these elements are just a hot mess - overwatch, valorant, insert other generic shooter with moba abilities/ultimates.
The game will get a lot of exposure purely because it's valve. It's one of those things, if this exact product came out and was made by a startup with next to no marketing. Would it die on release? Probably. But I hope it's good.