At least in Granary, you have to do a little bit of extra footwork to get up there. And even when you do, you have no cover and are in full view, and a healthy distance, away from the cappers.
In Coldfront, it's instantly accessible, even more so than the regular route, and the both the walls (cover) and the proximity to the cappers makes it an unbalanced position.
I'm beginning to lean on just slowing down those who want to get up there, since some players do enjoy the occasional surprise attack, especially vs teams who actually give them the opportunity to do so.
BTW, my computer is dead. the mobo is receiving power, but the front power switch does nothing when pressed. Consider me out for a good week or so.