TO me, the 'game break' isn't about something unbeatable in the game- every build can be beat, Battletech does a pretty good job overall of balancing itself- the 'broken' status applies to forces that are so awful to play against that players don't want to even deal with it- you 'win' by forcing your opponent to not want to even play the game anymore. Massed SRM carriers take forever to roll out, for example. I've heard the old legends about people who 'claim' (bleh) to have painted a dozen of one unit exactly the same, then play a shell game- which one is the damaged one vs. the one with the pristine armor? Who knows!
Antics like that are 'game breaking', to me- because I do gaming, Battletech included, for relaxation and fun. If a game is designed to simply irritate me into giving up, it'll work. ONCE. Congratulations on your hard-earned victory, revel in the odor of cheese, and don't call me for gaming with you again- I assure you, your phone won't ring either. Have respect for your opponent.