Should I switch to a larger room?

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

A room with an 18' length is obviously more appropriate. That will allow the MMG's to be placed 5' from the wall behind them, 8' from the listening position, the listening position 5' from the wall behind it.

Before having your MMG's gunned, try to listen to the Eminent Technology LFT-8b, also a magnetic-planar dipole (though with a sealed dynamic woofer for 180Hz down), but one considerably superior to the MMG, even with the latter having been gunned. 

@bdp24 Even though it is 10x12, the maggies are currently 4 ft off the front wall and my listening position is 4 ft off the back wall.  The tweeters are to the inside and my ears are 5 ft from the tweeters. I've heard some gunned MMGs and after hearing them, I decided to mod mine. I use two subs in my system so I'm good on the low end. 

I have the same sized room and have a floor stander in there along with 9 GIK panels. It is my office and I can do whatever I want. The thing that made the speakers work in the room was getting a professionally created $750 Convolution filter (DSP) to run on my ROON server, which is a few room away. 

This filter smoothed out the frequency curve of the speakers and just made the room sing.

www.AccurateSound.ca

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.