EPTThis was something I noticed just playing around on Scrap Station with Zerg.
One problem I had with ZvT was that T would wall in then expand to the island. I wouldn't be able to counter this until Lair tech. Given that I usually FE against T after a wall in, I can notice that he is expanding there with an OL, but I can't really attack it until Lair tech. And by then, he's already gotten missile turrets there, so it's a tough nut to crack and will likely require a doom drop.
But here's where the positional imbalance is.
If Z spawns at 3 o' clock, he can use an infestor to pop Infested Terran over the gap to the north. But Z cannot do this from the 3 o' clock. Because Stalkers were made to be unable to jump this ledge in Patch 17 in Beta, I think it should be the same way for Zerg with Infested Terran. Both Infested Terran and Stalkers with Blink are T2 tech. If it was denied for one, it should be denied for the other as well.
BTW, I'm a Zerg player. I have no beef with the race.
Here are a few pictures for illustration:
This infestor can't reach the island from 12 o'clock
Notice in the following pictures I do not have any additional aid from creep or overlords.
This infestor can reach the island at 3 o' clock
Popping Infested Terrans
