Bulletins that change the functionality of units are just asking for heinously imbalanced/lopsided matchups.
Already not having a good loadout of commanders can significantly impact your ability to play a match. Players can be crippled before the game even starts when choices made out of game can impact the match-up ingame. By and large these sorts of things can really put a damper on any sense of competition.
I mean, CoHO was chock full of ridiculously oddities and good lord that was the furthest thing from a competitive game environment. Sure it was fun, but it certainly wasn't competitively interesting.
I don't quite understand how it would put a damper on competition, if you wanted to tailor your army to what you like and anyone else could do the same. What would be the problem, could you make an example? If I could add a shell to my mortar that would make it shoot at a longer range but did less damage, or make my luchs have a recon mode I think it would just add a lot more depth to the strategy of this game. The bulletin system is really weak, it's just a feature that's not really taken seriously and it could be so much more with this kind of rework.