I find it absolutely fascinating how one unconfirmed interview from some Japanese guy's lodestone was enough for the entire community to start calling Alexander normal "baby mode" or "CT tier" and devise long-lasting implications out of that even though it directly contradicts previous interviews published by other sources.

But anyway, the hardest content should absolutely drop the best rewards. The problem though is that currently FCOB doesn't always have the best rewards because itemization is so god-awful, so you can end up with a T13 drop that has outrageous amounts of accuracy or skillspeed that don't do anything for you anymore. If this problem is done with in the expansion, then yes, go ahead and make Alexander savage gear exclusive top ilvl.