People will still much more use the shorter route I think instead of that new long one. You could put a 1 way door, that might make it a little easier for blu to push through. In goldrush stage 1 there is also only 1 route for RED going to the first area.
Personaly I felt that 1-2 was a little hard when I had my sentry up on that upper area (I guess you know where I did put my sentry, otherwise I'll show it on a screenshot).
Also capping 2-1 was a not too easy and not too hard but after we pushed the cart between 2-1 and 2-2 we couldn't reach the cart anymore because RED was pushing us back and we were all fighting around the 2-1, even though that was already capped. So make it a little easier for BLU to hold the 2-1 area and the area before 2-2 maybe. Use 1 way areas or more health for BLU or something.
Too bad we couldn't reach stage 3, but I liked the 2 first stages a lot!
