i've been playing the game for last 2 weeks or so with no issues even on med and heavy traffic on torchbearer ,this following week I can't stay connected more than 2 to 5 min max. 
i got two characters up to lv 30+ 
my friends can log on w/o any problems 
I've also put the tequila.exe under win10 firewall exceptions (i suggest trying to put the City o heros folder under the exception) 
tried the validation check in the tequila options 
I also tried making a character on the EU reunion server and had the same problem (they suggest trying EU server since it's a different area altogether) 
ethernet is not an option unfortunately 
I've also tried to disable the IPv6 with no results either. 
They have a discord link somewhere to the COH: homecoming discord (i dont know how to link it) and goto the Report-server-issues section. try posting there. 
my newest venture is using Wireshark (free) https://www.wireshark.org/   to record your network but I'm not sure how to use it. 
Maybe they can see what's wrong if we post that in a DM its listed under another post (the install guide v2.0) here in formums. 
Hope something helps as I still cant play it anymore.