Maggies often love acoustically reflective surfaces behind them for imaging, so the glass might work to benefit them in your LR. i have the perfect scenario for my rear wall for my Maggies in Canada, three acoustically reflective surfaces in an octagonal configuration (in other words a bay window). see the rendering i sent previously.
My room acoustics here on Maui are my big limiting factor and I can’t get planers like Maggie’s to work here. They work in my room in Canada, but not the big Maggie’s.
On the other hand my Kefs are awesome here in Maui but likely wouldn’t sound nearly as good in my room in Canada that has very different dimensions and surfaces. Very different indeed.