Pointed here from a friend, just want to add some details to your thoughts.
In UK I've used Ulix, Zoraida and Zipp. Not Ophelia...but she is - with Som'er and Wong - very viable as well. No chance for brewmaster and mah tucket...they need a BUFF, BIG one.
I still believe Gremlins are the strongest faction in this game, reckless is just too strong. Their problem is that they have not enough models...some are very strong and the biggest part is very weak.
You are right, we have different viable master with different viable styles. Unfortunately, the competitive range of viable models outside the "Gremlin-with-a-name bubble" is very short..almost inexistant.