I personally don't see a problem with it, I think it is a fun way to make a charger look more interesting. And I like that you included the fans to maintain the active cooling that was in place on the original charger.
The only issue I could see would be the fact that removing the case modifies the product and can negate the UL certification on the whole assembly.
We ran into issues with this on our charging system because we have two chargers that charge four batteries. We had to prove that the fuse protection and wiring was up to standards and the switches we used were rated for the current draw. All of this while the pit electricity was running through an unsecured overhead connection with exposed contacts that was hanging from the ceiling and running to a breaker panel that was locked shut
