Three Random Football Questions

Three things I've been wondering lately about the NFL:

1). Is it just me, or are there an unusual frequency of players getting their helmets knocked off during games? Are they wearing their chinstraps looser?

2). Why does pretty much every network t.v. broadcast team consist of two guys in the booth and a young woman on the sidelines? When will female announcers be hired? It's not like all the guy announcers played or coached football either.

3). Why don't offenses stay in the shotgun permanently? Are there any running plays that couldn't be adapted to the formation? Other than a qb sneak or maybe a quick fb dive, I can't think of any and the advantages for pass protection are obvious.