Can I build a playbook from scratch?
Can I do new formations? Pistol, trips, etc etc I tried the demo and couldn't find this feature.
Are there RPO plays? Can I design it?

Playbook yes
Formations, no (but you can do some expert level modding to kind of emulate it by moving players presnap)
RPO, no... it would be something that we designed into a future version for that play type specifically

Thx for the answer! mmm difficult simulate a Pistol formation or bunch with motions is not?
I like the idea but i was looking for something more customizable.

ima ctually surprised the modders havent posted the presnap-motion commands for formations that most people would like.

Yea, modding the plays.xml file or injecting your own players into the custom play xml area allows you to tinker with things. In theory you could move players into any formation you wanted to try... the only drawback is that it uses the formation you start from to determine the depth chart/package to use. So you won't be able to assign specific packages to a "pistol" play.