Hardware would go a long way in diversifying the arena.
It would be even nicer if each faction had a minimum of five ships(two new ships each month and after only five this becomes reality). Clones need two more ships, empire needs one, first order could use another and maybe even a capital ship, resistance needs two, separatist could use two more and sith could add another three. Bearing in mind that ships can also carry multiple faction tags, ex. Tie Advanced being both empire and sith, adding even just one additional ship in a month can be enough to shake things up.