As of now, the invisibility was fixed for the most part. There is still some issues in Battlegrounds with it, but that has been reported and the devs will fix it ASAP. Worse PVP? The only thing that has changed going from 1.7 to 1.8 is block hitting, which is still there but the animation was removed, and hitbox changes. This makes it even more fair, and takes away the great advantage you once had over other players. I honestly love 1.8, have been using it for a while, and it's really just something people are going to have to get used to. Switching back to 1.7+1.8 support would bring back all of those nasty bugs that happened with the MCGamer V2 update, and none of us want that, right?