The first thing you need to know is that the OpenWRT project is basically dead and that 95+% of the developers went over to the LEDE Project. However, LEDE has not yet published a stable release yet. You can get nightly builds that are in pretty good shape though. I would highly recommend an ipq806x-based system, if you can afford it. Almost always matched with qca9880 radios. These are modern 802.11ac wave2 systems.…
Do you have any real-life comparison of range/stability (and with what load on them?) on those models as from experience I know that raw comparison data on Wi-fi differs from reality.
Both this and some other Trendnet models I checked are not Wi-Fi Certified - has that been an issue for you?
As I'm in Europe the issue with TP-Link locking down firmware because of the FCC ruling [0][1] won't be a factor and I'm still not sure are they or TP-Link at fault?
[0] - http://www.smallnetbuilder.com/tools/charts/router/graph/117...
[1] - https://www.wired.com/2016/03/way-go-fcc-now-manufacturers-l...
[2] - https://www.techdirt.com/blog/wireless/articles/20150831/071...