I'm similarly in camp 3, or at least was. I played some KSP 1 but ended up getting distracted by life a bit before I finally left the Kerbin system. However, so far in KSP 2 I've been pretty solidly doing interplanetary missions. I've now done 5 interplanetary missions in KSP 2, and one of them was even a success!
In general, I've personally have been having a lot of fun in KSP 2. The updated graphics really does make me want to head to other planets and see them up close. I've got a fairly good machine and the only time I've experienced bad frame rate was with 4x physical time warp. Not sure if I'm just lucky or not but I have yet to experience a game breaking glitch. I've had plenty of glitches mind, but they usually have either been harmless or something I can fix just by loading the last save I made.
One other thing I haven't seen mentioned too often in KSP 2 is acceleration under timewarp. So far, most of my missions have been with unmanned probes driven by ion engines, just cause I think probes are cool looking. In KSP 1 ion engines were near unusable since you would have to leave your computer running for half an hour to complete one burn. With KSP 2 though, I can easily complete an hour long burn in roughly less then a minute, making ion engines way more practical for actual use. KSP 2 still has a long way to go, but they seriously nailed this feature at the very least.