If you're trying to limit C-classes I'd suggest just limiting Cs to 2 and other classes to 3. That way if a team wants they can still run tech and 2 other As (not that I know many teams that would want to do this).
It's about limiting any kind of class spam, health or speed. I can't imagine why the technician should get an exception, in this case.
Not trying to be rude, but not going to happen. Players have raised this idea in the past, and it's been shot down because I dislike forcing teams into a particular composition (which 2A/2B/2C very much does).
Why do you dislike forcing teams into this particular composition? I would understand not forcing them into a 3As or 3Cs, but that's what's already happening. SG? Keep it heavy. MA? Keep it fast. TDM? Might have something here, but if all else fails bring more orbs and a tech.
Hawken is a game where these restrictions make interesting choices like limiting yourself with heat, fuel. If you only have 2 A slots, you better make damn good use of that tech because there are only 2 Cs available to tank. Invariably, there will be incin+tech, but that's another can of worms.
With any composition available? Sure, there is more flexibility in exploiting class advantages. That doesn't sound like fun but I guess people call it competitive.
To make interesting use of class advantage, restrict spamming it and pilots will be forced to use it more effectively.
I'm not implementing more restrictions than are absolutely necessary. Too often, players - in any competitive league - assume something's overpowered or unbeatable before making any efforts to overcome it. We saw that happen with EMPs over the weekend, for example.
It is extremely unlikely that TPG will further restrict classes. I am simply letting posters know so that they might focus on something more productive - like the topic at hand, for example.
You make it sound like Hawken doesn't need any fixing. Whatever happnend with EMPs was horrendous. They happened, and then even more happened in the games following. I think all of those games would have been more fun without them. Without the orb meta the other modes have, EMPs appear to be the most valuable item in siege.
I honestly think that even A/B/C distribution would be a positive change for competitive play, especially for siege. If I'm straying too far from the topic somehow, I apologize. I'm not the Hawkenest, but those are my thoughts.