I don't think it is, since none of the devs, ever, mentioned anything about this. They did however, say that you can play campaign or just standard matches. When does an FPS feature a mode where you can just learn the maps? That's the whole point of playing the game...to get better.
I don't think they have announced it just wishful thinking. Most FPS's allow you to set up a game by yourself, in fact I do it all the time. Yes but trying to learn certain things while playing online is difficult and annoying to teammates. I would rather be offline learning routes then doing it in the middle of an online game and have my teammates yell at me for not doing anything.
Things to do while offline.
Find carney holes
Find routes
Practice using SMART
Get a general feel for the map
Things to do online:
Improve by playing other plays
Learn by watching other people play