Phew, 115$ for an Alphas kit and 130 for a numpad-less base kit all seem way higher than standard. I would definitely try reworking the kits, to stay competitive. There are so many more reasonably priced sets every month that I think it may be hard to get a lot of buyers for this one at these prices. Just my .02
It might be worth seeing what the price is to combine shiny + hiragana and just run with two bases?
Good luck, hope you get it figured out - set looks great.
I thought, "that's a great idea!"... until I remembered MOQ (I highly doubt I'll reach 250 for both base kits.)
I actually believe 2 base sets would do better than what you currently have. Look at all the GMK sets that have run lately. Not a single one was in trouble of making MOQ with the exception of a few add-on kits.
Here is the thing. You have other competition for base sets besides what just in this GB. There will be many other GMK sets whatever month this runs so if buyers can't get covered for a decent price they will just look to other GMK sets that have better base sets.
For $15 you could add alphas into the shiny kit and yes you may loose a few sales out of your base kit, but at the same time you will also gain sales for people who were on the fence of buying both kits for $245 and only covering one board but for $260 they get two sets to cover two boards...
You could always run a survey to get the exact feedback your looking for...