The problem is that this question needs to be discussed, but it can't be discussed here, so it must be discussed in meta meta math SE. But discussing it there would mean we already have a meta$^2$ MSE, so the question would actually be "should we have a $m^3$ MSE?" But we could only discuss that on $m^4$ MSE or higher, and so on.
So my thought is that we should have a $m^2$ MSE, but only if we allow $m^3, m^4, \dots$ MSE's as well.
One reason for having a $m^2$ MSE is because I was about to ask why each question must include one of "bug-feature, request, discussion, support" when I realized that this should go on the non-existent $m^2$ MSE.