The multi turret reminds me of the T-35 Russian tank, with the multiple turrets and multiple sized weapon.
Its the closest to the Land Dreadnought design that went into service.
At the time they were conceived multi-turret tanks weren't such a bad idea. However the technology advanced much to fast for them...
-Engines and suspension weren't all that reliable, so you wasn't terribly fast and pretty much had to work with (and against) infantry.
-AT guns were still in their infancy, so heavy armor wasn't a high priority.
-Due to said low speed and infantry you wanted guns in several directions.
-Due to said lack of AT guns there wasn't much that could be used against both infantry/bunkers and against AFVs.
All those problems were essentially solved by the mid-30s, but enough people were already sold on the idea.
Does that thing have four or five turrets??
5: HE gun in the middle, two AT gun and two MG turrets.