Dont you think the game due to low resources on one location favors whoever can expand the fastest ? Production, replacements. Taking a new location, emptying it fast, moving on.
when the game constantly forces you to expand as fast as possible, throw in resources to stall an opponent, while you quickly replace the losses through more expansion ? One faction gets all the benefits of expansion. Zurg main building is a universal barracks for all units, all required is some tech buildings.
Universal production buildings ?
Z
Multiple production charges ?
Z
Creep so that you can keep the pressure, reducing the need for any transportation through high movement speed ?
The focus on constant expansion and rapid resource depletion from any source favors the faction even more. They are the most favored through expansion because they are also given a new production queue, without the need to specialize.
Protoss have self-build buildings, once started. That Z worker isnt consumed in the building process and is back morphed into a drone ?! Makes âsenseâ.
That mines were given friendly fire ?! (why build them then)
That tanks do friendly fire, but lurkers not ?
Banelings not doing friendly fire ?!
Which Z units do friendly fire ? 
Anyway, general setting, the more a faction is slow on the map and the more the low resource setting promotes mobility, the most the most mobile gets rewarded, because it tends to snowball and there is no competition. A slow faction will have less resources and less mobility around the map.
Static defenses are of the weakish kind, the only thing without supply cost doing ground damage is planetary fortress. It has some nice aoe, but at 550/150 it is expensive and 7 range is nothing. 40/2s.
I was watching those championships in Katowice, when maru was knocked out. The general trend holds.
maps have too few resources for the terran to hold on to/survive without trying to compete.
But again, even if lurks dont and wont do FF, why banelings dont ? How is terran micro not rewarded for manual targeting of banelings ?
Why siege tanks and mines can be used against themselves, but banelings do nothing when they explode within their own ranks ? Chain reactions ? Why banes shouldnt require some spacing micro if you want to use them to their fullest ?
When Z dont do friendly fire, why do nukes do ? Just like in coop. A huge difference in difficulty.