My only concern is that this does not lead to Mk III and Mk IV worlds you run into early game (so before you have your own high-mark units) having noticeably more units. (I understand the reinforcements do take the ship cap into account, so if you increase the number of ships in a ship cap you might see more reinforcements.)
Beyond that, it's just adjustment. This is a small enough change that it won't really change anything I don't think.
Not from a combat perspective anyway, it might change what people unlock when if they are now getting more fleet ships. (I'm looking at you Starship K costs.)
D.