All very well and good, but it is the first point of the map, it shouldn't really be feasible for red to hold it unless the teams are way imbalanced. It's not just the red chokepoint that gives it the advantage, it's that there's no cubbyhole or location of decent cover on Blu's side of the choke for them to set up or recover, even dustbowl stage 3-1 has this.
Moving the CP back isn't the only solution, but that place does need to be improved in terms of giving blu some advantage over what they have now.