I would love to have a marker list in my left side zone but I am sure there are other things that would be handy to have in a zone. I could imagine having half of my channel strip in there like sends and inserts on whatever track is selected. I have the “Channel Settings” window open 90% of the time to deal with. I could see this on the bottom zone and include all the things we have on the right side with the midi and plugin info channel presets etc
Expand the lower and right zone.