I believe separating APD and SRT would be a good idea. And making an SRT faction with command (SRT Commander, SRT Command, SRT Member) and the whitelist will be only for the srt member's. And copying how SWAT works in the APD is also a good idea they choose the good player's to join the SWAT. This will improve the srt and make the domination have more competition. As we saw before several months until now the domination is being controlled by one gang i can't even remember when is the last time we saw another gang win the domination and i think making an SRT faction will solve this problem even for the future. And making the SRT faction will make SRT more organized and it will give the opportunity for all the community player's APD, Civ, Medic to join the SRT faction.
And the another idea is to make SRT only go for the gang who's winning it's going to make the domination more fun and give the other gang's a chance to get closer for the winning gang.
In my opinion the first idea will make the domination more fun and it give's the opportunity to all asylum player's and there is player's without a gang and they don't know any gang owners to join any gang the srt will give them a chance to join and this will even make more people join the domination as we know this days the domination server doesn't hit more than 60 players and both of idea's will end the one gang always winning it will give another gang's a chance.