Everyone knows that P relies a lot on those storms to keep their army equivalent or greater in size to Z's army. Pure zealot/dragoon/archon gets ravaged by pure hydralisk, ling, lurker and it's always been like that for the most part.
P had their times, the original 2 gate opening which led to a lot of zvp imba discussion, 1 gate tech with stargate, then finally FE variations, +1 legspeed after FE, the FE into corsair reaver, FE into 4 gate zealot/archon for that push on destination, FE into zealot/sair, all of this.
Z has matched them all the way, and it seems the point that most modern ZvP/PvZ are at are the accumulation of hydralisks and then a batch of mutas at an appropriate timing to snipe protoss templars which essentially resets the army advantage back into Z's favor for long enough to make that advantage into a larger advantage.
Now, I do not do the statistics, I know there are those that love to get in the nitty gritty and rely even solely on statistics of match-up percentages, which is great and fine, so I will not get into any statistics.
What I do want to bring up for discussion is not anything *new,* or even necessarily innovative - it's the Dark Archon. What I do want to bring up for discussion and thought is it's new possible use in the current PvZ/ZvP metagame coinciding with the timing of that one batch of Zerg mutalisks that is used to snipe protoss templar.
The unit has been used for ages, especially lategame PvZ by many players for maelstrom vs ultralisk masses but the metagame use of the unit has been very limited in that respect, as there is no set timing established by professionals or even foreigners to begin producing a Dark Archon.
Not to mention there was never a need. The Dark Archon is virtually limited in it's metagame usage, as it's a unit that is time and energy dependent, that has no guaranteed pay off for creating. It does not do direct damage, so it's net worth is not added into your army.
But now there is a clear need for the Dark Archon in this muta-stacking and templar-sniping age of the metagame. I think the Dark archon more than ever now will end up having a place in the PvZ mid-game at that timing of the mutalisk snipe group - but only if players begin to use it, and start grinding in a specific timing to produce that dark archon.
When a Zerg player creates that batch of mutas, it is essentially the same purpose for which a player would build 1 queen, or 1 dark archon, or get one early science vessel - for that one limited metagame use at that timing of the game.
The "Bisu Build" or style of play going straight to corsairs, and using dark templar to harrass, can be effective, but Zergs are so used to it now, that it's shut down relatively easily.
But, the build and style should not be dismissed by current progamers or us now because I think you can use the same exact style and build but now branch it off to make that specific timing for building up Dark Archon energy.
Rather than attempt for a harrass that in the current metagame we know has a high percentage of being stopped, I think players need to start experimenting with using the same dark templars of bisu style of play for a dark archon to accumulate energy for maelstrom, while then playing "straight up" and accumulating the normal gateway based templar/zealot/goon ground army.
Like I mentioned, I do not think it is anything new to use the Dark Archon to specificly maelstrom a harrassment group of mutalisks, but I do think specificly planning 1 Dark Archon into Protoss builds in preparation for the mid-game muta sniping of templar is a new-ish metagame idea that is not seeing much usage.
The main thing is having a set timing for adding the Dark Archon into the build so it can accumulate energy. Then ideally, when Protoss is moving out with a templar/gateway based army, Protoss's army size will be able to remain the same as Zerg's due to maelstrom preventing templar sniping. Zergs will essentially be putting dead cash into that typical mutalisk group.