It would be nice, it's very frustraiting to need a few more pins for a project. Galileo was designed to be affordable and put it in the same price range as most of the other boards. So I have to wonder how much would adding the additional components increase the price of the board. Since you can slave a mega board off the galileo (or so I've been told) and many projects can be done with just whats on galileo, I feel like most of the pins wouldn't be used very often.
I believe with the current implementation that it is not possible to have more I/O pins, which is the main difference between an Uno and a Mega.
This is something that I am sure they will consider when doing the next revision of the quark product.