ya, that suck!.
What does that have to do with SRT, at all (no offense!)? You can SRT without both legs (single foot ascender), or just your arms, especially with a 3:1 set near your PSP (primary suspension point)/ TIP.
Pardon me, but fighting friction from a moving rope all the time is like fighting the tide, IMO. Its useful for going down, like from a crane, or before felling the stub, and certain situations, but few, IME/ IMO.
If I climbed more than a tiny bit of DdRT, I'd probably be looking at the O-ring system closely. You can go with theoretical 3:1 with a pulley up top, rather than a theoretical 2:1, and still pull your way up.
Can't beat a ladder for those trees, a lot of pruning trees, too, IMO.