see my reply at https://community.tp-link.com/us/home/forum/topic/187958?replyId=476834 I noticed that the C2300 would slow way down (over ethernet or wifi) where I enabled any QoS or any...

@Carl I had identical issue with a different model (AC2300)-- got it MUCH faster, up to almost 300Mbps, by doing two things (I should have tested after each one, but I didn't feel like waiting for...

Identical situation. getting 500+ Mbps (up/down) over ethernet up to my c2300-- but LAN through the C2300 seems to max out at 65Mbps down, 5Mbps up. And similar maximums over 5ghz and 2.4ghz.