I have some serious problems with the newer version of MT in my case multiple Router boards running 2.9.46, I have had no problem making the older version of hotspot work on previous versions (the old way) but this new way I have been messing around now for about 5 months and I cannot upgrade the old routers until I can make the new hotspot stuff work.
Heres the crux of the problem. after just a couple of minutes the hotspot seems to become very unresponsive slow down and die, and become completely unresponsive nor can new people authenticate and get online..
Using radius - Hotspot and MAC authentication. Assigning REAL Ip’s tried both static and dynamic on IP assignment, People who are behind a customer owned SOHO router get a login page no matter what. Going to secure sites the web browser complains about not having cookies enabled,
Theres some serious problems afoot.. anyone have this problem and know how to solve it?
Is there a way a person can downgrade their boards to 2.8? I like the new hotspot method where any packet will authenticate (or should) without opening a web page first but if it does not work. Im scared of going v3 because im not sure if they will come back to life after the upgrade..
oh and how do I make the mangle rules work so the packets are tagged hs-auth for entire network blocks? so I can bypass the hotspot? the walled garden seems to work 50% of the time 
Thanks