I don't think those are reasonable expectations you have there, nor valid means of comparisons.
Granted I don't have the game yet, I've long since learned those are not standards games can be measured with, so I didn't even stop to think about how much fun I will be having with this game based on the map count.
Also, from what I've seen, it's more about freedom and each playthrough being unique thanks to the many ways you can approach quests, and not about the size. I'd rather compare this game akin to Arcanum than to BioWare games anyway.
