I never played 3599, I got out of gpgnet before forged alliance was a thing (and I assure you I never want to see the original vanilla supcom balance return
) so I have no idea if the balance now is better or worse than then nor do I really feel qualified to judge the current balance. That said, SunTzu, if your argument is that tactics have somehow been more limited due to the changes faf has made, then there are a few things I'd suggest you do:
First, figure out what changes from the current balance you think would help make those tactics more viable, we aren't going to revert 37 patches that I'm pretty sure the majority of the community would say have improved the game overall (perhaps not every decision was great but based on what I've seen I think its safe to say most people prefer the current faf over 3599), not to mention that many of these patches have had important bug and exploit fixes which then had to have balance fixes attached to them to not overpower things.
Second, don't dismiss the idea of having a 3599 featured mod up and being played, the best way to prove that we have lost tactics over the years is to have games being played in older versions by people of decent rating, having these sorts of replays as clear evidence is a very important step to shifting balance in this direction if you want things to change, but remember that things will ideally always come in small changes, reverting to 3599 is too large of a change at this point to ever be done all at once and honestly having painstakingly gone over every change faf has done over its many balance patches I don't think we will ever exactly match the balance of a previous version of forged alliance (nor would we want to, as stated before bug and exploit fixes do occasionally spur needed balance changes).
Lastly, abandon the idea of achieving everything you have listed. I fully agree with you that if it is possible to expand the tactical options available to players we should try to do so, but I have no idea how we'll do it or if those new tactics will be the same as tactics we've supposedly lost. Similarly, some of the things you list are not desirable to everyone, for instance I don't agree that we should change the comm death nuke back to 4k, I like not having multiple commander explosions as often, perhaps the community as a whole will decide against my opinion here or perhaps they will side against yours, I have no idea, but in the end things like that are more about how the game feels than its balance and there isn't really a right or wrong answer there. Similarly, 3599 undoubtedly did have balance problems as faf almost certainly does now, its possible that some of these balance problems can only be fixed by limiting certain tactics, I don't know if that's true or not, but its a very important thing to keep in mind that even though a tactic is fun it or the things that allow it, are not necessarily balanced or desirable; similarly a changing the balance to make one tactic more viable may destroy another tactic.