I played last night, despite the terrible conditions. Everything was coming up LTK or Cradle or LTK-Cradle. Makes me want to scream obsenities.
Nick Nack's smallness will be a double-edged sword. You will be smaller, but because of his disproportionate body, his head box is going to be just as large as anyone elses.
Other Nick Nack thoughts in my head that we must consider:
1) Server option to allow/block Nick Nack, since competitive servers will certainly want to regulate player stature.
2) He has stubby legs, he probably can't jump very well.
3) He will easily take cover, but he will also be forced to expose himself (lol) to fire because he can't peek over things, like the buckets in Cradle.
4) He won't be able to melee for shit since he will have a hell of a time attacking the player's head.
5) Also close up, he won't have his arms protecting his face like average-size players often do, plus enemy arms will be always blocking their faces.
6) Every time he's on runway he'll have to say "DE PLANE! DE PLANE!"