Yup, they are two paths the collide into one path. The choke can be handled. Just try it instead of putting it down saying it wont work. You have a narrow path leading to SHGY which can easily be defended. 1-2 ele shamans with a boomkin can knock people off the edges almost all day.
So that isolates everything on left side and keeps your reinforcements coming from the GY. Once you are at the log you do have the archers support. What I said before you can ISOLATE the IBT at the choke. You can make it so those archers do not even hit you. At SHGY choke you pick if and when you want to use most of the archers just by falling back a little.
If you don't think you can make a good choke out of that I'm baffled. I remember a game I was leading using the FoS as a choke. That is a huge place also. Also think about if the GY gets Ninja'd. Would you rather fall back and take it? Or would you rather push up and take it? I can put it another way for you also. Would you rather gain ground or lose ground? Could take a few people to get that GY back if a few rogues shadowstep into the gy and maybe a prot warrior heroic leaps up there. Get the the flag ninja it. 4 rogues can keep a big number off that flag.
There is always pros and cons for everything. I do see a lot of advantages to SHGY choke. Think about it these way also. More room to run by people will try and run by. Smaller area people will always dismount and fight. at SHGY you are going to get people trying to constantly trying to run by. You also have that OP ram sitting there which always seems to find me.