Good suggestions, and I can clarify a bit...
I have experimented quite a bit with levels of the front and surround speakers, and the level output of the center is much more.
I have also compared large and small settings for the center, but it did not improve.
Very important is the mention of age/hearing. I'm almost 68 and am sure high frequencies left town years ago. However, some movies I watch have little issue with dialogue making my hearing less a factor. It's more that quieter dialogue is hard to comprehend unless I cup my hands over my ears.
Yes, it is my concern about mixing technologies (electrostat vs dynamic) would sound wonky, but when I listen to music, I listen in stereo only, unless it's a SACD with surround capabilities.
The electrostatic panel sits 28" from the front wall. I have a 85' TV panel wall mounted. I have also tried a piece of sound proofing board behind the panel, but it sounds better without.
So far, the only thing that helps is cupping my hands over my ears, which is why I thought of a horn based center.