Why should the choice of licence not be a fair concern to express in the comments? I'm not questioning the validity of the authors' decision per se, but the considerations and priorities behind it, and whether they ought to be different for a project of this type. I don't see how this side is less important or interesting to consider than the technical one (on which comments seem quite commonplace, and rightly so, in my view).
If my actual opinion interests you, I might lean towards the LGPL, rather than the GPL. I find both of them more beneficial than any of the MIT licences for a UI framework, but strong copyleft might do more to hamper widespread adoption and interest in the project, which seem an important factor as well.
