Since I got the TL-R605 1.0 (firmware 1.0.1) connected it all works like a charm with the OC200 (v 4.3.5) and 4 EAP225 3.0 (firmware 5.0.3)
 

although I would like to put in a feature request(s) for the Speedtest feature:

1) Schedule time windows for speedtest

Currently you can choose to run every x hrs to run the test. It would be nice if you can select a time window when it should happen. This way you can perform it outside business hours to have a more accurate test, where the test doesn't have to compete with the day-to-day traffic. 
 

2) Other speedtest providers

would be nice if you can define other speedtest providers like for example fast.com, speed.cloudlfare.com. And maybe also the possibility to configure your own iperf (iperf.fr) server. 
 

3) manual run speedtest

An initial speedtest run can be schedule via the interface. Would be nice to be able to do that after that as well. Under the bandwidth options there is a feature to do so, but that measurement isn't adopted in the speed overview. 

edit

And set the official bandwith speed as it should be according to your contract.
 

Hope it's clear... if not please let me know 

PS - Not sure if this is the right location for this post.