I don't mean to be a dick but without giving actual reasons all you're saying is "I preferred ow1", which is kind of what my original comment was referring to. Tank synergies is definitely something that was lost with ow1, rein/zarya and dive comps were very fun and definitely something I miss. But it was also a major source of balance issues and player frustration.

Two tank team composition was a consistent balance issue and severely restricted the design of tank heroes. Sigma is a really fun and interesting hero, but when he was added overwatch entered a prolonged two shield meta which was incredibly boring. The devs added a cool hero, and he made the game worse. Not only did he make the game worse, but there was no obvious or easy solution, because sigma wasn't the problem, two shields was the problem. In my opinion that exemplifies how bad of an issue the game was facing and justifies the changes made.

There's nothing wrong with preferring ow1 but the person I responded to called it "a terrible game compared to the original" which is just blatantly incorrect in my opinion.

The tank and 6v6/5v5 has been heavily discussed, recently devs made a long devblog about it. I can kinda see where you're coming from, I think, but between balance/queue times/the average player (of which there tends to be more of when you're with 5 others instead of just 4) it seems to me like 1 tank works better in practice even though it struggles when compared to the ideal world+nostalgia goggles.

I was very pleasently ~~surprised~~ not disappointed by the monetization, like uncompleted weekly (battle pass -primary method of profression) challenges carry over, so in theory you can do all weekliesduring the last week if a battle pass. also aren't the new heroes available if you play just a few matches?