The microtransactions really aren't a big deal unless you care about cosmetics. There's a paid battlepass and you can buy skins. Better for all the F2P players who never bought the game, but sucks for people who spent money on OW1.
They just released a long blog post explaining why they switched to 5v5. tl;dr: the main reason is queue times. Secondary reason is making tanks feel more impactful. Tertiary reason is you don't need to learn complicated tank synergies (144 combinations of tank v tank versus 17424 combinations of 2 tanks v 2 tanks). Finally, performance issues, especially on consoles, were probably a big concern that they didn't directly mention.
https://overwatch.blizzard.com/en-us/news/24104605/director-s-take-opening-up-the-conversation-on-5v5-and-6v6/
If you want to go in and fuck around with your friends, it's fun. Not
as
fun
as OW1, IMO, but still decent. If you want to be sweaty, I think probably find something better.
He/Them
"Am I a butterfly dreaming I'm a man... Or a bowling ball dreaming I'm a plate of sashimi? Never assume that what you see and feel is real!"