You started out with at least OK depth, then you added bass and lost the depth. But you really didn't lose what you already had, maybe you lost some of your midrange in the mix when you dialed up the bass region.
Your room doesn't look bad. In fact, from all the shots I've seen posted from LS6 owners (early on), your room is one of the best! IMO, these speakers can sound bright, even overbearing in a bad room, and getting good depth often isn't easy.
I really struggled to get good imaging out of my 6's. But in the end, they were awesome. They were replaced with Dynaudio Confidence C1's which offered better depth, but inferior sound. MBL's replaced the Dyns (after the Dyns burned

) with even better depth in the same room, magic really.
But what really added dimensionality to the 6's was a tube preamp. Wow. Radiohead, In Rainbows, played miles deep. I miss that. Yorke's voice would just trail....
I think moving them further into the room might help with image depth and perhaps even spiking them if they are not already spiked. My wife and I were constantly playing with placement. I mean really experimenting. We even tried tilted them incrementally. No that didn't work. We seemed as I recall to settle on 40" from back wall with a pretty good turn inward nearly facing toward the listening position but still being able to see the inward sides. The best tweaks were the platinum sonicaps and felting around all those tweeters to help with diffraction.
Of course outside of tweaks that opened the 6's up were an expensive amp and tube preamp but you have a pretty solid setup and a world class speaker so be patient.
Our room was dead. It was heavily treated, perhaps too much so but it's so hard to determine what's best in a room. In our "new" home our room eats midbass. Just swallows it up. Our system sounds somewhat lifeless. So I'm starting from scratch with sound room treatment fundamentals and work from there.
I've even considered those crazy tuning cups (ATI zen or something). I sat in a room and was blown away (or tricked) at what those did for soundstage. So simple. SO EXPENSIVE! (But then, how much am I going to spend for room treatments

)
Good luck and share with us what works.
I think your cat found the sweetspot
