30 Watts per pound is the bare minimum to make a plane fly. A sailplane will climb on 30 Watts per pound, just barely. I don't know about you, but most sailplane pilots like to get up to altitude ASAP, and if I remember correctly, you did mention 45 degree climbs in one of your posts somewhere.

That Promax 4014 Cobalt is a pretty hot motor, and should be plenty to fly a 2# glider on 8 cells.

I'm runing the numbers on http://brantuas.com/ezcalc/dma.asp, and your setup looks pretty anemic. You're only drawing 10.7 Amps according to the calculations on the 3.7:1 ratio with the 11x8 prop.

We can work with this!!!

Just like a glow engine, electric power systems can be tuned, and usually need it. There's no need to start fresh each time you have a "failure." One amazing thing about electric motors is that you can get them to make more power by simply increasing the size of the propeller. Go to a 12x8 prop, and you increase static thrust by 20%, from 25 oz to 29 oz. That's pretty close to 1:1 thrust to weight; the plane should climb at a steep angle. Amps are up to 12.8, which is fine if you don't run the motor at full bore for the duration of the pack.

Wing loading is right around 10 ounces per square foot, which is not bad at all. This plane should fly great. If it doesn't, you might have other issues, most likely an undercharged battery. Have you got a peak charger?