Thanks to all. I might get away with some good looking corner traps, but I think that would be about it.
I have the speakers about three inches at the back of the speaker in front of the cabinet.I do have nicely focused voicing and fairly good detail placement within the soundstage, but very little depth and the soundstage never extends past the speakers.
There is no chance of removing the cabinet between speakers. Am I wasting time and money by trying corner traps? I have been playing with toe in, sound anchor speaker stands, placement, ICs, speaker wire, Dacs, etc. for three years and have the positioning as good as its going to get without removing the system and going to another room (not a possibility).
Thanks to everyone for your consideration. Always find advice here helpful and generous.