T21 and T22 have so much variation of fighter bays. Multiple uncommon and rare bays, legendary and exotic built-in bays with unique stats, other legendary and exalted bays that can be put on any ship. Wide range of stats so you can tailor your desire for range, speed, tankiness etc.
T23 is so bland. One uncommon that is really weak, one rare that is better but meh, and then it jumps right to exalted. Not much variation in stats and no legendary one as a stepping stone between rare and exalted.
Additionally I also would point out that while rare, there has been a tradition in SS for as long as the game has been around and among some players for those with freighters to use fighters for both fun and some extra dps. So perhaps also consider adding a one-slot t23 freighter bay since all the other tiers have such a thing? Appreciate consideration.