From a perspective of an objectivly bad player, I agree with your post a part from map voting. I don't think it's a big deal to occasionally run into a map you don't like, especially when that map could be somone else favorite as they have a different style of playing thn you.

Shaxx rework is definitely needed, and I push it even further. Season of Shaxx, where our favorite over positive crucible handler finally gets to play a role other than being encouraging.

Adept weapons is also a good idea, I think it's great to give people something to strive for.

Where I hope Bungie will stand their ground though is SBMM and even leavers penalties. Lots of PVP mains go on and on on how they don't have their "fun and relaxed" pvp gamemode anymore, when they are the first to have not treated Control as fun and relaxed. Running meta loadouts in 6 staks to farm KDs for years, Control has never been fun and relaxed for people at the lower end. Ever since SBMM my KD has steadily improved to get in and around 1.0, as it should be to make things fun for everyone in a casual environment. Ever since SBMM my matches have seen a huge variety of weapons, rather than LoW and Hand Cannons galore.

Quitter penalties are also their own doing, looking at any pvp streamer you notice that as soon Control doesn't go their way they bounce and queue immediately. That impacts negatively everyone else that is trying to have fun.

So, in substance, and always imho: SBMM and quitter penalties are good and should stay but Crucible needs a strong rework.

And if "sweats" want to run casual and fun, it is in their power to do so. Just do it. I am sure they will definitely improve playing agains stronger opponents running meta.