Up front, I wanted to say that I think the balance team, zep, and everyone have done a great job with balancing the game, and in no way am I trying to bash them. I appreciate the work and love the product. Also, I'm not complaining about big changes like engy mod or t3 air tweaks or potential double drop bomb removal. This thread has to do with individual unit tweaks patch to patch, and was particularly inspired by the aurora changes this patch and aeon t2 last patch.
I think in general, people might tend toward over-correcting in patches. Everybody wants to chase the perfect change right away, and I'm sympathetic to that. Furthermore, if we under-correct, or even correct just right, people won't change their strategies that much off the bat, and that's less satisfying. However, I think we'd be better served making changes slowly, even nerfing the same unit in consecutive patches if the initial changes are too small, for several reasons.
1.) Ultimately, there is a wide range of solutions to a problem that improve balance. Opting for a relatively large change is more likely to produce unintended side effects. You never know how one balance change will spill over into other aspects of the game and create the need for further changes. By making smaller changes, we minimize this problem. Furthermore, the imbalances in sup com are relatively small. If, over time, we make only undercorrect, each change will be an improvement. Ultimately, it means that over time the game will always be improving and we may not need to make as significant changes in future patches.
2.) The larger a change is, the more it breaks the continuity of the metagame/playing experience for everyone. While in a way this is desirable because it's nice to see your changes have an immediate impact, it also disrupts the game, especially for people who aren't following the development as closely.
There are other reasons too, but those are a good starting point. This isn't supposed to be an insult to the balance team, zep, or anyone else, and no I didn't do a lot of balance testing. Everybody puts a lot of time into this and I really appreciate that, and I'm very happy with the product. Overall, everyone does a great job. It's just a suggestion trying to be helpful so that we can do an even better job.