I assume much of where the difference of opinion comes in is that while the decorations may seem inappropriate to some, they do seem to be pretty well made. I can tell you if they were at DL USA, if we had that an extensive overlay, they'd all be plywood cutouts. And chances are we wouldn't get that extensive an overlay.
So while I can appreciate how beautifully done the various figures are (yeah especially that thing pulling the Mark Twain), it still seems inappropriate. And by inappropriate, I don't mean too scary or not Disney. I mean that, if Main St. is indeed a turn of the Century street, those pumpkin men don't make any sense. If Main st. was celebrating Halloween, they wouldn't have had such elaborately scary decorations in the early 1900's. If it's supposed to be some Nightmarish reality come to life, taking over a small town street, then it doesn't seem elaborate enough. All it seems like is that the people at DLP decided that Halloween was more important than guests being able to enjoy the general themeing of the park, which they would surely get far more out of.