Omoruyi was hurt midway through last season (left knee dislocation) and again toward the end of last season (left knee hyperextension), and it seems like the argument is being made that he'd somehow never heal, or that there'd be know way he'd make it through next season healthy. Or that he needed a season off and surgery.
I think all of that is pretty rampant speculation. A healthy Omoruyi was a force for us last year (and the end of the year before), and he had grown each year since arriving at Rutgers. He was a "cagey vet" already as a junior, knowing how to work other players and the refs to get calls at times, and played "old man ball" a lot of times with patience and fakes under the basket. When healthy, he could be a force - even while playing undersized at PF - and he had developed a jumper in the early part of last season before being injured.
That said, he would not be 100% for spring workouts, and would still need to recover and rehab his knee back to the condition it was before the injuries. There's rumor (without anything substantiated that I've found) that he wanted to sit out this year to recover, but then there's video posted by him of getting up for a dunk (which doesn't look like his intention is surgery, rest, and rehab). Since I can't confirm any rumors of sitting out, I will dismiss them and assume he'd be in playing shape by November.
A LOT has been speculated, guessed, rumored, fantasized, etc...
1. Using his post-injury performance to speculate on his roster standing next year. That's not really valuable, because it's assuming he'll never be healthy again. He'd be much healthier in October/November of next year than he'd be in April of this year - so, saying he's being beaten 4-5 weeks after his latest injury by Harper/Yeboah may be true, but it isn't that telling vs. what he'd look like in 6 months. He's also been a hugely improved player year to year twice, and there's no reason to think he wouldn't improve further as a senior.
2. Assuming he'd get hurt again next year. No real evidence to support this, since all his injuries were freak incidents that aren't standard. Hard knee on knee contact, hit and over-rotated while in the air, and a wet spot on floor. Any of those things could have caused the same or similar injuries to any of our players - it was his bad luck that he got all three of them. His knee has never given out on its own that we're aware of, and there's no telling that either a) it would suddenly just buckle, or b) another freak incident would happen.
3. Assuming Yeboah would be better than him next year and would take his minutes. Again, no evidence here, but at least there's more to go on. Yeboah was a star at a lower level, and also dealt with an injury last year. He's got a similar frame to Omoruyi, but is much more of a shooter. It's certainly possible that he'd be better than Omoruyi - but I doubt it would have eaten much into Omoruyi's minutes. Harper/Yeboah/Omoruyi could each get 26 min across the 3/4 spots, and that's not even including time Yeboah/Omoruyi might spend at the 5 backing up Johnson. Plenty of minutes to go around, and it would have been really great depth to have.
4. We're somehow better without him. This is just crazy. He's a good player, has proven he's a competitor at this level (especially defensively), and would be a rising senior with 4 years in the program. Anyone taking this position is saying they'd rather Carter/Doucoure get more minutes than Omoruyi, because that's our depth at the 4/5 now.
5. We won't miss a beat without him. Maybe? But next year wasn't about "not missing a beat", it was about growth and challenging for higher ranking in the conference. Having both Yeboah AND Omoruyi was a big jump in talented depth and cause for real optimism that we could make some noise... Yeboah INSTEAD OF Omoruyi being a "wash" doesn't move the needle in the same way.
6. He'd cause team chemistry problems. This has the most potential for me in terms of "maybe this isn't as bad as it seems". If Yeboah and Harper really got more attention and production, and he slipped more into a 6th man role with his 25-28 min, would he have accepted that? I don't know. Did he not gel with the newer players, or not like that he might be pushed to the periphery in some way? I don't know. Was he angry at Pike for bringing Yeboah in, or angry at the team for accepting AY and ribbing him? I don't know. It's possible that any of those things could cause tremors that could crack later in the season and cause problems - and if he wasn't in step with the plan and the team goals, then he may have caused problems if focus were to shift.
Overall, to me, from a numbers perspective, it's definitely a loss - no other way to see it. From a personality/chemistry situation, that might change the nature of the math a bit.