The map is supposed to be large. It marks the first advance that kicked off the battle and thus is not meant as an instant sort of action map. Once flag bearer spawning is introduced you'll be able to stick with your regiment better throughout the round.
It is a rough place to defend as the CSA, yes (as it was in real life - the divisions had to fall back until Hood's division came up for a counter attack straight into the cornfield (which will be featured in another skirmish area). I wager you'll look forward to some of the larger, open areas once you've been fighting in the cornfield for an entire match.
- Trusty