Going back and fourth on why the special days are their is pointless and moot; it has been discussed over and over again. I get you point of view and respect it, even partially agree with it; but their is a bigger picture that even you agree you do not see the point of. While there is a SIGNIFICANT percentage that agrees with your POV, thee is also a SIGNIFICANT percentage that thinks the game mode gets stale at points in time. We have a responsibility to fix the second issue above all else.
I suggest we focus efforts though on the suggestion in this three however as it is a amazing idea to fix the problems you specified in your other thread, giving players the option to choose for themselves. Steps like these are how improvements are made. I'm very glad you are have unbridled passion to make eGO better and actively participate in suggestions, we need more of it in eGO.
Additionally, we could gain better analytics to tell more clearly what and where things are struggling, to plan additional options like the others you've suggested.