Another vote for rune mono legends here. They are just far better looking than the cluttered alphas+subs.
I have a suspicion that a lot of those votes for sublegends were just people wanting to get english alphas without having to buy a separate kit, NOT necessarily that they thought sublegends looked better. If you made the base kit have mono english alphas like most other GMK sets, and just offered a rune mono legend kit separately, I think you would make people from both sides of that pie chart happy and sell like fire. Just my optimistic hunch though.
And for those who would be bummed at having to purchase another kit for those rune mono legends--if there wasn't enough interest to meet MoQ on a base kit with those rune monolegends, which would you choose: spending extra on a rune monolegends kit, or not having the option to get rune monolegends at all?