It does look nice.
It got me to thinking about the "perfect" sign-up sheet in my mind. Here's some thoughts, take them or leave them.
I LOVE the map-list check boxes!
I may be biased, but as long as you are adding ED and DD, why not TILE WARS?
I don't know if "set" column is necessary.
DCI # is no longer relevant. Might I suggest Gamers log-in name in it's place? Maybe even a spot for your bloomilk one too?
Also - you should drop the reinforcement/reserves part. I've always thought it was ridiculous to have that section, as it is totally useless. You'll never know if you're going to get reserves, and the whole point of reinforcements is that they can change.
Otherwise great work!
I do like the idea of having a uniform sheet that everyone uses.