ive definitely seen 5 stars i was on the fence about signing for no money, for AP only basically. some i signed some i decided against, and thats in like 10 seasons of recruits. i'm sure there are some i wouldn't really consider for high d1.
i do question if seble changed up the rankings in 3.0. it sure seems to me most 5 stars aren't total ****, which used to be a fairly common occurrence. i would say im 90% sure he changed it. old recruit rankings took into account only starting ratings, because of how potential was added later. the distribution of high d1 caliber players in the top 100 vs outside the top 100 seems massively different to me, than 2.0. i feel like 2.0 it was pretty severe, i would see 5 stars i would barely or really not at all consider at a good mid major. now i feel like there are guys i wouldn't take for free but they are more rare, with a fair amount of 5 stars i would basically take for minimum effort just because of what a crapshoot 3.0 recruiting seems to be, but i wouldn't feel good about it.