I support the AP part of the feat, it was a big contention back then because there weren’t any feats near that level but now there a couple. That said, I highly disagree with anyone other than God tiers scaling to this since they’re the ones with actual higher feats that would relate to it. Your examples of Uryu and Ichigo make no sense when base Uryu(who you try and use as a basis even though he spent the majority of both with fights in his V2 form) scales to TS Ichigo. When that’s directly disproven by the fact when Ichigo sent one Getsuga his way, he dove out of the way and Ichigo was on top of him right after. Then he immediately used his strongest form to fight an Ichigo who was holding back, while he went all out. This was confirmed by the anime team on the official anime site.
Renji especially doesn’t scale, sure he overpowered base Uryu(who already doesn’t scale to TS Ichigo) failed to do any damage with his second strongest attack. The second Uryu used his first stage VS, Renji was outclassed. He barely deflected an arrow, and got overwhelmed by a barrage from Uryu. The second Uryu used his V2 Vollstandig, Renji got put down immediately. And that’s the only version that remotely scales to Ichigo considering Uryu didn’t feel confident enough in either fights to let it play out while he was in base(as he did against Renji).
The LS is a whole different can of worms. We have Ichigo taking a specific test to see if he can withstand the weight of the 3 realms, and he struggles with it. But what you’re suggesting is people who are far weaker scale to his LS even though we’re shown by the most damning evidence, Renji couldn’t even stand up in Ichibei’s room due to how strong the reishi was. He spent almost a day there and the best he could manage was to stand in one spot and stare at rukia. That’s such a stark contrast to Ichigo who was walking around no problem and never once commented he felt anything pressure from being there