All things considered, Lil and Keurlan DO have a somewhat strange relationship, and I'll admit I would like to see it developed further, to see what would happen.
As for Keurlan being stuck at 85 I reckon it would be best to drudge yourself through 85-90 now, rather than when the expansion hits, because then you'll be even less bothered with it. So assuming you have time, you'd want to do it soon-ish... Or hope that Engineers get schematics for flux capacitors and DeLoreans come next expansion