I think upkeep is the most obvious outlying issue and the most simple fix for Relic at this point. It will be interesting to see if they do anything about it.
I'm still, perhaps naively, of the opinion that Blizzards can be worked into a positive gameplay element that opens up more options rather than stalling the game. It just needs lots and lots of tweaking.
What probably won't get tweaked later is the physical visibility portion of Blizzards so I'm glad Inverse brought that up. It needs to be addressed asap.