TP-Link Archer C5 and OpenWrt

I just replaced my good old WRT54GL by a brand new TP-Link Archer C5 AC1200. The C5 has the exact same hardware as the TP-Link Archer C7 AC1750, so if you plan to use it with OpenWrt, there's no need to buy the expensive one. For me everything is working fine, I'm using BARRIER BREAKER (14.07, r42625).

The only issue is that you cannot configure 5 GHz Wifi in 802.11ac mode. I tried the workaround described in the wiki and configure it on the commandline using uci, but I failed. I have to investigate on that...

But most probbably I'll just wait for Chaos Calmer.