I've been playing for about two months now, after a multi-year break from the game. Just casual, not competitive (although Stadium is classified as competitive). It's great.
Two bad things for me. Flex Queue means Tank, which sucks, because I'd like to play all roles, but now have to just queue DPS/Heal. Also, the matchmaker is shit, so most games are relatively one-sided (Quick Play and Stadium).
Nope, the game is and will probably always be spammy. Everyone has unlimited ammo. I definitely prefer this btw.
There's map control of course, just not like arena shooters. Most maps have changing objectives, around which the fights happen.
Instead of more difficult weapons you're managing your abilities and cooldowns.
That's just the kind of game OW is.