Playing my Gw2 Engi again after a long break!
I’m with you – kits are a lot of fun. The nerf related to kits has to do with the change to the Kit Refinement trait – the effects on kit swap got changed drastically (the previously OP effect on the grenade kit – grenade barrage – was removed completely killing the 100nades build) but more importantly the effects are now on a 20 second internal cooldown so it’s very difficult/ not feasible to rely on them in a meaningful way (unless you have one kit I guess) so nobody is using the trait anymore. I think for levelling and dungeons it doesn’t matter quite as muhc though.