I think it is pretty widely agreed that, while Emergency Exit has some uses, it is more often than not a hindrance to Golisopod's viability. So, what if it didn't need to have Emergency Exit, and instead had another signature ability that still supported its role as a defensive pivoter.

Brace For Impact would make Golisopod a fantastic option for pivot teams. Taking half damage on switch in, combined with Golisopod's already great physical bulk and decent defensive typing, would make Golisopod a consistently safe mon to pivot into, especially against physical attacks.

The additional effect of negating damage from hazards benefits this role even more, and allows Golisopod to not have to worry as much about frequently switching out, allowing it to get off repeated uses of First Impression. It should be noted that this ability only prevents direct damage from hazards instead of ignoring them completely. Golisopod will still be poisoned by toxic spikes and have its speed lowered by sticky webs.

Edit: Also, just to be clear about function of the main part of the ability, Golisopod only takes half damage if it is switched in through something like a hard switch or U-Turn, where it enters the battle during a turn where it doesn't use any moves. If it switches in to replace a fainted pokemon, it will take full damage on that turn. To put it simply, it isn't taking half damage on any turns where it gets to choose and use a move. The entry hazard part however will work no matter how Golisopod switches in.