The menu music was originally Werq by Kevin Macleod, which while good, is used in a lot of other media/games. I really wanted something unique to Redmatch. Also, Werq was the menu music in Redmatch 1, so it was nice to switch it up a bit.
By the way, the sniper zoom isn't new, I just set it as the default scope in the update. In the main menu go Customize > Weapons and you can set up any scope you want for any gun (this has been in the game for >6 months, people just don't seem to notice it)