What is the problem with a faction being "broken and overpowered"?
You can just, you know, not use their stuff. It's always fun to have challenging opponents.
I have issues with broken, OP and low quality mods being mixed in with the best of the best
And all but Templars do "challenging opponents" wrong, thus leading the player to obtaining the broken, OP ships and making the game a freaking joke
If you don't like them don't use them. If you think the ships/weapons are OP then don't use them.
When I play Dark Souls I know I have the option of getting the Drake Sword and trivializing the entire early game, but I don't.
When I play Sonic I know I have the option of getting the emeralds super quick and trivializing the entire game using Super Sonic, but I don't.
When I play Valkyria Chronicles I know I have the option to scout rush everything and A rank every mission super easily, but I don't.
When I play Ace Combat once I unlock the Falken I know I have the option to crush every enemy with its laser, but I don't.
Self regulation is the best mechanic. This is one of the reasons why RPG is such a popular genre, people with all skill levels can play and enjoy them because you can regulate the difficulty of those games by how much you grind. Neutrino and other OP factions like Approlight present more options and more interesting opponents to fight, this is something that the so called "best of the best" mods lack (apart from IBB stuff) because they are tied to vanilla balance. I'm OK with that, but don't go around saying people shouldn't support other factions because you can't control yourself when presented with their weapons/ships. We all know that running an OP fleet gets boring very quickly.
Even using their stuff can be fun if you are using their destroyers against fleets of cruisers and capitals or playing the game solo-ship.