It's not a proposed map pack. It's the first DLC.
If you don't want more crafted maps, don't get it.
That's not a really good answer. This is more akin to 'horse armor', it is a DLC that very few people will care about (since most people prefer playing on random map), and will waste a lot of goodwill from people your company just barely restored.
For 5 bucks... heck, even things like a couple of new weapons or one/two new monster lair type would had been much worthwhile than maps. I will probably buy this map DLC anyway, but not because of the maps themselves (I probably won't play them ever), but to hope you will add more content later on.
But for normal people who has no feeling toward Stardock, this can backfire quite easily.