electrostatic vs dynamic sound

hello !

i have recently moved my speakers( sonus faber olympica 3) to an open
floor living room and they started to sound terrible.

I have installed absorption panels on side walls and corners but they
didn't help much. 

Lots of echo .They literally sound like i was in hallway. I previously
had them set up in smaller room with lower ceiling and loved how their
sound.

I know that Electrostatic speakers may sound better in large , open floor area but i'm worrying  about sound "flavor"
Them most important thing i loved about SF olympica 3 was their extremely smooth sound . Very musical , not to bright,  more on the warm side.

i think about to trade them for Martin Logan Expression ESL 13A. they are in same price range.

is it a good idea ? anyone compared sf olymica 3 vs esl 13a ?

thanks !