Skied my pair another 11 days -- 5 at Deer Valley and 6 at Telluride -- 17 days on them total. DV had not had significant natural snowfall in 3 weeks, and likewise for Telluride, so conditions were not great. Snow was firmer at DV vs Telluride, though both mountains were doing well preserving what they had received in late December/early January.
Got a tune in DV (1 deg base, 3 side) on day 7 with the skis and did not notice much difference in performance of the ski. So I suspect the factory tune was quite good (I do not have the tools to measure it). Had them sharpened/waxed again at about day 15 to remove some burrs.
DV groomers were definitely on the firm side, but with some technique improvements I could get solid edge hold on all groomers. Most of the time skiing at DV was groomers. Time at DV was also spent mostly in lessons/drills and these skis were great for doing 'technical groomer stuff.' Bumps at DV were quite awful -- very solid and horribly shaped. Our lesson group spent little time skiing bumps due to conditions - I found about one good line in Empire (lookers right of the chair) among ~10 different bump runs.
Telluride was a similar story for groomer snow quality, but bump shape and spacing were much better and the snow a bit softer (even though little new snow in about a month time). The GT86 was great everywhere at Telluride - favorite runs being stuff accessed by Chair 9, Stuff under Chair 6, and Revelation Bowl (the parts with snow). With my prior skis (Kendo), I would be skiing bumps/off piste all day for fun, but the GT86 have made skiing groomers so much fun I was splitting time a bit more evenly between groomer and off piste. I don't feel like I gave up much in bumps (if anything) with these skis. They just make my time on groomers much more enjoyable, which is great when the snow is lacking.