This is difficult to predict based upon no real picture of the terrain and where the avalanche occured. Rapid warming would be turning the 30cm loose to moist. How is there no wind transport but signs of wind slabs with light triggers?
Depends on the actual nature of the terrain trap and how much of the 60 cm of new could pile up.
I would assume thst s skier, even in a small slide can easely get carried over cliffs, even in moderate terrain
Moderate likelyhood due to the mature timber and terrain trap, probabilty low consequences high
Deep slab, shallow snowpack and 100 m.X 100 m. slab could make for ugly consequences.
I maybe overthinking here...trigger windslab unlikely but if I do, not that unlikely to step deeper
I think this question is not real on a slope of 20 degreees or less
Will not trigger a slide on a 20 degree slope.
most snowmobilers killed in size 3 avalanches.
since this slope has additional "decision points", I may change my mind, and then you wouldn't ever know what the chances were of triggering an avalanche.
as per previous comment - depends on 'features' and trap
too low angle
depth of slab and terrain trap, unlikey to go but if it did
it's lower angle but terrain trap swings the balance
slope angle less but still deep enough  to be  ugly in the terrain trap
not liley to move unlesthere was a mini feature in there
depth is less, but a bigger slope negavitve, but has a good run-out
based on that there would be no wind slab on this feature and if there was it would be small and the reulting injury would be from a tiny windslab and tumbling down a steep slope.
assuming slab is limited to "thin breakable wind crust"

I would likely feel comfortable directing the clients to the lower angled (closer to 30) terrain and avoiding the terrain trap. The additional decision points speaks to islands of safety.
I would just give instructions to stay away from the unsupported edge. Lets face it low 20 degree terrain in mature timber, how is this really avalanche terrain?
No wind transport and low angle is the key.
the relevant issues here are terrain - protected from wind effect and small slope size
Too big a slope. Ski pen can affect layer of concern.
snowmobiling on 40 degree terrain is hard without obvious instabilities.
tending toward not feeling comfortable entering the slope, but would depend on micro terrain
as per my previous comment depends on if truly sheltered or not
because of Na activity and terrain trap
given the terrain trap i'd look somewhere else
if the slope is really capable and has wind slabs no
i'd have to  be there, but maybe
windslabs or not, large feature 40 degrees and 60 new. no thanks
these terrain traps are the biggest thing keeping me away with a guided grp
i don't think its steep enough, but still not keen on the terrain trap
in a pinch i'd ski here but i always try to stay away from the terrain traps even when its good
again I don't follow the field obs but sounds like could get a small grp down safely