Would be nice if the cream base had cream colored alternatives for the accent keys. Like the other base has, cause now you need to buy both if you want the single color
Since the mold is manufactured as a complete set, this requirement cannot be met.It is recommended to purchase the novelty kit as a matching accessory. 
I don't follow. You have the keys in the other base kit already. I don't see a reason they can't be on the cream color base as well. I am not talking about the novelties, I mean the cream colored ISO enter, BAE, arrow keys etc. that you have already included as a variant on the multi color base but which are not on the cream color base where they imo should be.