I'm not too worried about it. There was a lot of shit area in Skyrim where there wasn't really anything happening. Definitely nicer to look at a sprawling plain all the way to the mountains but in the end if there's no substance, it doesn't serve much purpose. Do I wish it was bigger? Yeah, but what can you do. Here's a comparison
I thought fallout 3's was fairly small and it looks to be much bigger, albeit a lot is water (dlc maybe)?
The character scales a likely a lot different so should probably be taken with a grain of salt.