Every slayer match is a melee fest and every encounter and overall battle is just a nasty mess.
Movement around the board is way to quick and killing is too slow. By killing too slow i mean 5 shot rifles compared to 4 like halo 2 or zero blast radius grenades. So instead of going for weapon kills its easier to just sprint i to someone and melee.
With a 4 shot br, no sprinting, and no instant respawn, the game will promote a more strategic style. Players will prefer to hold areas down and not bum rush every single time. When it takes 5 seconds to respawn players will take a more cautious approach because they know they cant instantly resume play. With no sprint, melees will drastically go down because players know they wont be able to just sprint up to someone and hit them. Witj quicker killing main rifles, youll also have to be more cautious and use your brain more because you would die faster. Quicker killing main rifles would also promote more power weapon use because players would want something to counter.
Those are a few suggestions to slow the pace of the game down a little and not be so messy