If I controlled the game design, I would make the white pump shotgun into the green pump. So shotguns are uncommon and up only. No more double pump too, as switching to and from the shotgun will have a slightly longer animation so you might as well not change weapons for a faster shot speed.
I'd also change it so something like drastically less explosive ammo spawns. But I would make it so 1 explosive ammo reloads more than 1 grenade launcher shot to keep that balanced. I'm okay with having .5 explosive ammo if you were to reload a single shot of your grenade launcher. But effectively there would be less rocket ammo on the map and I would also have a cap of about 10 rockets being carried at once. I mean, the other route is to nerf RL meaningfully, but I'd try this first.
I was also thinking that maybe rockets could deal half damage in the explosion and half damage in an AOE fire effect that is left over, which would take a few seconds to get to full damage. It would still be effective vs structures while being instakill vs players.
Sniper rifles would have a faster shot speed up to a certain range. I've grown weary of how clunky snipers feel. Could probably put a range indicator on the scope. Body shots would no longer deal >100 damage and leg shots would deal significantly less damage (perhaps for all weapons). Headshots would deal up to 195 unless legendary which deals 200.
Hell, I'd probably slow down the TTK by somewhere like 30% to be quite frank. But barring drastic changes like that, I'd start with those changes. I don't want close range fights to be determined by shotgun fights as often nor do I want long range fights to be determined by somewhat lucky and somewhat odd feeling sniper shots.
I don't even really get that feeling in solos anymore. Sometimes when the final 1v1 is intense. But usually the last person is someone that doesn't build and runs straight into rockets. Kinda takes away the satisfaction :P
I feel like it's the rockets that drain the satisfaction of those wins.