This is to be expected as you are repeating the signal which halves thruput and the use of it will also slow everyone else on the same access point down as the channel is in use while re-sending the packets to the downstream devices.

Only reason is if they manage to get a 25gig or something (like we got 2.5 and 5 over cat5e) that works over 6a in the future. But buying for future possibilities is foolish.