Fill leakage gaps/holes in AC condenser cabinet?
The only thing that doing what you suggest would do is theoretically lower the head pressure. When I service air conditioners often times I have my gauge hoses sticking through the door so there was about a 3/4” gap all around the door. I felt that this would raise the head pressure so I taped all around the door. What I found is that it made no difference. My general recommendation is don’t mess with the factory engineering, it can cause unintended consequences and best case it will do nothing. That condenser coil on the other hand is likely costing you quite a bit of efficiency.