I would like to see that most rechargeable abilities aren't rechargeable over time but instead if you get 2 kills.
I would make an exception to some abilities like sage's and skye's heal as well as any character who has their smokes recharge, if you pick up certain utility while the match is still going like cypher cam, kj bots, chamber teleport then they would still recharge after a cooldown, but if they were destoyed you would need 2 kills to get them back.
I would nerf breach's aftershocks range and damage a little bit, tejo's salvos would be slower moving through the air and do less damage
Also make it harder for offsite post plants, more obstacles, smaller plant box etc.