A couple of random thoughts cobbled together....
1) Any chance Giorgi has some sort of nagging injury that's impacting his playing? Didn't he have some sort of undisclosed hand injury last year that supposedly hampered his outside shooting? Could it be continuing? Could it be getting worse? Could it be a completely different injury? I think "the yips" is the simplest explanation right now, but who knows...
2) w/r/t being "on the bubble"...excluding the "really good teams" (think Duke, Gonzaga, KS, Baylor, FLST, etc.) to me a team is still "on the bubble" if you aren't very confident that they would make the tourney as an at-large if they lost the rest of their games. If we lost to NW, Indiana, OSU, and IA (and then lost our first game in the BTT) I'm not sure we'd be in. In fact, I think we'd be out. To me, that means we're still on the bubble. Win @NW and we're REALLY close. Win vsIND and then we're off the bubble. We could then lose our last 2 games and be comfortably in IMO. Not sure how exactly that ends up reflecting in the NET Rankings.
Maybe your definition of being "on the bubble" is different. If the season ended today, I think we'd be in, no questions asked. But it doesn't, therefore we're not guaranteed a spot, therefore we're on the bubble.