I wouldn't mind if the 10+1 pull eliminated 3* Knights entirely given that they're fairly common, especially now that some missions and events hand them out for completing a stage or beating a super raid boss on a somewhat consistent basis. Barring that, rearranging the general gacha odds in favor of 4/5/6 Knights would be nice too.

Maybe something like 31.5/55/12/1.5% odds for 3/4/5/6* Knights instead of the current 63.5/30/6/0.5% odds. That would mostly flip the way the odds currently work (31.5/68.5 in favor of non-3* Knights instead of 63.5/36.5 in favor of 3* Knights).