i use /quirks on always for tests or speciality for any wallclimp levels
but i have to say:
i really prefer wallclimp on vanilla jazz2.exe !
i also made a little example wallclimp level, and found out here, if i do very high (jumps + wallclimps)
this is kinda hard on plus
because on plus, to do a wallclimp: it seems it works kinda different
(its more easy to get into a wall while do the quirk )
and for higher walls more difficult than bevore
but this is not the way how it should works.
its just different than bevor.

.
I agree with faws idea, that we should use on tests a command to bring back all the vanilla physics
so that wallclimp works the way it should be
.
.
and then the other thing is:
i somehow prefer playing tests on the treasure gamemode
i know.. you can hit here players, and annoying them, but somehow it makes me lots of fun to play it in treasure here )
but..
im sure that i am here alone: to prefer playing tests on the gamemode treasure