I'd have to say that this form is seriously constricting. Some of us WANT to run 4 shuttles or 4 HWKs as a squad because that is cool and squad-like and rather fun.
I think the takeaway here is that different people get fun different ways. I know that I get my fun by deeply embedding my games in the SWU, but I also know that I'm a bit of an outlier in this respect.
So, the challenge is to connect with the people who share your conception of fun, and build (or find) a structure that allows you to do that.
For my part, I join Rekkon in his thematic limitation, though I implement it radically differently.
Well it kind of stops those who think differently from doing what they love with your shared games, which I think is a little sad. Of course, compromise is good and I'm sure they will find enjoyment in other aspects too. Honestly though, I love my singular shuttle.
Also, more complex rules make this game even harder to play optimally. Added complexity is the last thing this game really needs I think.
You see a lot of complexity creep in MTG up until like 2010 when they realized this and began taking drastic steps to tone it down.
I would say though, that if the systems work, it should be fun anyways.