I just hit 60 last week and I felt like I was going pretty hard the whole time. But, I did refuse to join any spam/cleave groups. I was extremely happy to have the old leveling experience back and wanted to do it proper, tried to hit the major quests in every zone, did every dungeon once along the way, etc. The upshot of that was that I think that by avoiding the cleave groups, I avoided most of the toxic players. My experiences leveling up, in groups and solo, were overall fantastic. Can't wait to do it all again, eventually, at a more chill pace.
I thought I'd slow down a little after hitting 60, but.. not quite yet! It's been a scramble to get that Ony attunement.