Should I switch to a larger room?

You're listening near field, which is great. Moving to a larger space will change the presentation. I think you'll like the increased dimensionality.

"A dipole loudspeaker in a 10' x 12' room?!"

Yes. I am in a similar sized converted bedroom and have managed to get very good performance from my Innersound Isis. 7 feet between the speakers and 7 feet to the listening chair. 30 inches to the front walls. The one big compromise is very little room between the chair and the back wall. Experimenting with Ted's HFT devices (and vibration control in general) has helped immensely in this regard.

That being said, if I were in the OP's shoes, I would take that extra square footage in a New York minute. 

yep………in 1 second…and the work and experiment will make you a better listener…..have fun

Yes, a larger room will be better, especially since you have Magneplanars.

yes, do it... sound should improve