@tromp @drvn here’s a 5 minute quick n dirty prototype:
My personal 2 cents (about the original version)
Pros: Really nice and creative concept, in particular chained blocks, and cut through, very much in the spirit of Grin! 
Cons: Not super legible, not sure how it looks big and small, does not feel particularly iconic/memorable, and… it feels to me as though the ICOs of past have already taken the “hey let’s make a minimalist logo out of some geometric shapes”-idea and iterated on it in absurdum. I therefore fear that this style would have Grin blend in very neatly with the general population of alt-coins. This is not the fault of the logo itself, it’s rather a victim of unfortunate circumstances. 