About 5 or 6 patches back the game was much more balanced.
to be fair i pretty much agree.
I can understand the origional nerfs etc, as they were TOO good for their Tier spot. but now, theres just not much point in making them at all.
against Protoss & Terran their no longer that effective.
The only good thing about it is that it will cause ZvZ to become more exciting and micro intensive

Muta/lings will now become more viable earlier on yey.
I think to balance it out would require a tier swap with hydras. Make Hydralisk T1.5 and Roach T2. nerf the hydralisk accordingly and buff the roach accordingly. Only problem with that is it makes all Zerg T1.5 "light", which means it gets torn to bits by Hellions. not sure how effective they would be without some awesome micro from the Terran though.