As much as I wanted the 90Ti KP, and despite how good the hybrid coolers are, I want a flagship that I can integrate into my loop -- however, these delays were what finalized my decision to drop from the queue as I'm now out of town for over a month, away from my test bench. By then, I expect more availability of 90Ti FTW3/Strix/etc. waterblocks from the different vendors and I'd go a different route.
At this point, I wonder if the E5 will get a 40-series version instead, haha.