I'm a former 2Ce sig owner; currently own 1Cs.
Don't know how much bass you have or want but if you put two stacked Lenrd bass traps (Aurelex), in each corner behind your 2Ces, you will improve the imaging and the bass clarity because there will some absorption and you will minimize phase cancellations. Also, an absorptive panel on each sidewall where, if you were sitting in your listening position and you had mirrors on the side walls such that you could see the speakers in each side refelction, at that wall position, such absorptive panels will minimize wall reflections so that you get more direct sound from your speakers, in essence, widening the soundstage and allowing you to hear much more of the musical content, detail, timbre and imaging. At least this is how I would and have approached smaller listening environments with success.
Don't know how much bass you have or want but if you put two stacked Lenrd bass traps (Aurelex), in each corner behind your 2Ces, you will improve the imaging and the bass clarity because there will some absorption and you will minimize phase cancellations. Also, an absorptive panel on each sidewall where, if you were sitting in your listening position and you had mirrors on the side walls such that you could see the speakers in each side refelction, at that wall position, such absorptive panels will minimize wall reflections so that you get more direct sound from your speakers, in essence, widening the soundstage and allowing you to hear much more of the musical content, detail, timbre and imaging. At least this is how I would and have approached smaller listening environments with success.