Sichartshofen is waiting on the upcoming release of CC to add these new weapons but this isn't the first CC custom map actually. Maikop (made by Greenhell for the mod and now again for Ostfront

) is the first completed custom map and there's a few others underway. This one looks really good though and I'm happy to see it available right off the bat.
When it comes to classes I always try to go for as much variety as possible (without hurting historical and gameplay limits of course). To offset the problem of 'everyone will have an MP28' I always put the most common weapon in the default weapon slot. Most players will just pick the class and go along their way, meaning the weapon in the 1st slot will be the most prevalent on the battlefield.
Can't wait to play it, now back to mapping for me. Must... not... delay... CC release... ugh.
Oh, and CC does have artillery observers (spotters) SchutzeSepp. worluk has been working on a few additions to the system since this video as well.
http://www.youtube.com/watch?v=5kQpQ0LS9z4