They've already nerfed the battle stats. Reducing regeneration time in line with the new battle stats is not a buff. It would only be "balancing" the previous nerf.
Heroes are fine. I like mine as is. The abilities are your 'balance'. They never existed before. Yes they may be weaker, but learn to adapt. Move on.
Supercell gave out refunds to anyone who called apple/google support, so that pretty much made up for nerfing the heroes and not decreasing the regeneration time. I guess if you had no purchases in the last 90 days you got kind of screwed though.
I agree there heal time should be reduced.