[Meatex]

This was my standard ZvP build until I started encountering protoss that could make HT
Very nice write but missed that point. HT's will melt lings but I find they don't do enough damage quick enough to banelings at least once you have 3,3
I don't think its as weak as you say to forge fe into stargate at least if you go 6 min 3rd. and extra queens are always good because usually every expo after the 2nd you want to add a macro hatch with it

I have tried playing around with keeping the drones on gas and going for armor first (which I believe takes longer) But usually I will takes guys of of gas at 100 and leave one guy on. Evo at 64 gas which will pop exactly when you have 100 - then baneling nest at 50 gas then 2 guys back on gas. Lair at 100 then grab the 5 remaining gas.
The benefits to this is faster econ (the third will go down at around the 6 min mark) but at the sacrifice of fastest +1 armor. Its also weak to zealot heavy gateway push because you don't have enough banelings in time because of delayed gases at 2nd and 3rd.
This is fine if he is 3 gate expanding or forge FE but other more aggressive builds will cause problems.
If the protoss does a 1 base stargate opening he can deny the third because most maps don't have nearby third.

I usually skip infestors and go for insane amount of banelings and lings with broodlords. though its situational as you can't defend lots of spread out bases with this
you need spines to defend drop harass and control his ball with insane number of lings and blings

The reason this style is good is because its not AS vulnerable to good force fields. Of course the toss can FF you but you can pull what you have left back and reinforce or drop on him. But the key is constant harass with lings and banelings via any method you can. You need insanely good multi tasking ands high APM for this style to work at higher levels where the toss will have good FF

Anyway good write up

Suggestions to add should talk about threat of HT
Also the need to harass and deny expansions
And lastly you have to know when to engage and when to counter. The strength of this is that the protoss is kept afraid (as long as you stay active with the lings) so he won't want to move out. If he tries to shark, lings will come in and kill his nexus or workers etc.
Thats very hard to do while staying on top of your macro so the build is not anywhere near as easy to pull off as roach hydra.
And its so sad to see all lings disappear to 2 storms TT especially when you have over 100