I know this is a bit late, but I second the recommendation for an updated openlook and XView on Tribblix. In addition, ol/xv as a default desktop environment would be an strong differentiator for the distribution, IMHO. Along those same lines, Tribblix could more aggressively tout the historical justification for its SVR4 packaging, highlighting its retro-ness.
And thank you so much for tribblix; I was about to give up on illumos after repeated trouble installing OpenIndiana on my laptop (Tribblix worked out of the box on the hardware). I’ve since picked up a copy of “Solaris Internals” and have spent some time appreciating Solaris. Kudos.