It is a day of firsts though. Ten years of everyone bitching about how 3e focus des too much on balance compared to AdnD. But now it's 2e that is more balanced.
Well, i find they have very different kinds of balance issues. 2E balance problems are pretty apoarent at a glance. From a GM point if view, that is quite easy to manage. 3E balannce issues tend to surpriyse you, and that can be very hard to manage because you often ended up approving options before realizing their full potential. That said, i like both systems. I think 3E does flexibility well, and the balance issues are just a natural product of that (well worth it really). 2E gets the flavor I am after and works better for certain style campaigns for me (i have run back to back 2E and 3E Ravenloft campaigns, and vastly prefer the flow and feel of 2E to 3E or that setting). I also like things like different XP progressions for different classes as a blancing factor, and I like that not all classes are built with combat in mind. The NWPs also work better for me than the later skill system (though i realize i am an outlier there).
Now, if you dont view balance over the campaign as a viable method, sure 2E will seem unbalanced to ou, but many, many people do. Locally pretty much every GM i know who has gone back to either 1E or 2E after years of 3E has really been surprised by the level of balance and the reduced number of problems they face in that area as GM (though challenges is probably a better word than problems).
YMMV. If you feel differently, i am not going to try and convert you. However those if us who play 2E and prefer it, often find it's approach to balance better than 3E. There are definitely some min-max options. Buy they are widely known, easily removed and it just doesn't lend itself to uber builds like 3E does.
i will say though I find many of the complaints online about 3E are rarely encountered in an actual campaign, or less of a problem when you apply all the rules as they are written.