A targeting system could be purchased as a module that would allow a specific part or weapon to be targeted and destroyed. It would have limited uses of perhaps 2 and could have chance percentages attached depending on how basic or advanced the targeting system is. Taking out an opponents big weapons could allow a weaker player to prevail. Also, targeting legs could immobilize an opponent.

Along similar lines, a repair drone could be purchased instead of an attack drone. Each turn, the repair drone could be used to fix the mechs parts. It could take several turns to fix a big weapon, etc...or it could be simply used to recover some hit points throughout the match.

I would really like something along these lines.

first idea is completely ridiculous and should not be implemented for reasons obvious to most but I actualy like your second idea if by repair mech parts you mean it adds a little bit of HP back to the mech each turn