No. Adding yeast probably won't help much at this point. They're doing their thing. Aeration is pretty important with a beer as big as this. You saw I was using O2 in mine. I pitched a 2L starter into 1.090 wort and it was coming out the blowoff tube in 12 hours.
The temperature isn't the problem.
Now, all that said, there isn't necessarily a problem. At this point, I'd leave it alone.