Actually the EURO pack price will probably be the same as the base set price, or very close as it is. It's true we could get the price down by removing those extra 3rd legend versions, but I don't see the fun in not doing the layouts right. I think those little details are one of the things that may draw in more people by having their correct layout. But it's just a guess.
I want to keep in the BASE set the blank and numbers row without any shifted legends as an option for all the people who use other national layout that can't be included right now. I think it may be a good compromise situation as one can use those generic keys which some may feel are better than a wrong character. Additionally the blank keys can come in handy on some other keyboards like 75% or 122key, some may prefer the less busy look of the numbers only , or they could be used as the upper deck of function keys on a 122.
Windows and menu keys are doubleshots. There is not mold for old style 9x Windows logo, all those were always pad print on Cherry keyboards. GMK made their own windows doubleshots in the last years 7 and now 8 style.