One thing that concerns me are the little nooks and crannies of that map where a cunning captain can invisibly block a capture point. Back in the old days On Desert Scrap there were a few places you could hide a squid so that the game would consider it "on point" but the other team could not see it from the real point. Canyon ambush is a much more complex map with many more crevasses to exploit.
Hamster, yes, you have an extremely valid point. However, this would almost entirely be taken care of by the point moving. Even an excellent pilot wouldn't be able to hold the point from a hidden position for more than 10-15 seconds before it left them behind. The point being on the move requires that the holding team has to keep up with it. If they let it gt too far ahead, they risk losing it.
But yes, a lot of care would have to be taken in setting up the point boundaries and flight path to try to minimize the spots where the point could be held while hidden. Heck, maybe the point boundaries could even change depending on where the point is on the map. If the point shrinks as you go through a tight spot in the canyon, the attacking team would know that either the holding team would be off the point, or there would be a perfect ambush location.
Imagine the power of mines for the attacking team. Create a wall of mines ahead of the holding team and you force them to either tank the damage, or find a route around the mines to catch back up to the point. I am also envisioning a squid doing moonshine powered strafing runs, popping balloons and setting everything on fire for a couple passes before a sweeper ship rolls through at low altitude and wipes out the disabled holding team.
Err... And since I just looked a little deeper, despite the fact that I have not seen this suggested anywhere else, I will apologize to whoever is about to be frustrated with *yet another* map idea thread.