Coliseum Damage Cap is Pathetic

All three of my era toons are at 45.  They cannot advance in arena now.  I get the boss to 60% health and the boss begins doing 40k or more damage single target or one shot wipes the entire group.  

The loaned Vader is far below level 45.  His health and protection bars look like a level 20.  His damage is minimal.  

Coliseum Game mode is so gated it’s pathetic.  No sense of accomplishment or achievement.  At least I have a few GL’s left to collect for that satisfaction.  

They are making it a crawl.  It is purposedly a lot slower advancement than other parts of the game.