Believe it or not, my BIGGEST problem with Lanes isn't that cut/paste is unforgiving, Mutes are relatively unpredictable, you can't see JUST the Lane you want (solo'd) when the Lanes are collapsed as Jlien asks about, but I seriously get lost in them! It's so incredibly messy how they're laid out, even if logical. They just add more clutter, rather than make it easier on your eyes and your project orientation. It's VERY easy to confuse a Lane for a track on a larger monitor. Worse, if you leave Lanes expanded, then shrink the track to minimal height, the track prior to the one with Lanes showing might be mistaken for the track your Lanes are actually on.
They're just "Greasy" to me. I still feel they were "slapped" on to X2 rather than really worked during Beta.
Let me add something here about Beta testing that I'll bet even Beta testers aren't always trying: "Stress" testing. Double-meaning. How many Beta testers routinely try out new features or new releases with a stop-watch? For example, Create 5 tracks with 3 Lanes each, label them, take Track 5 and move it to Track 2 and re-label it to Snare Drum, arm all tracks to record. Record three takes of each. Then take three snare hits and move them from one Lane to another.
This is the kind of Professional Beta testing I was trained years for. This is where you discover what features REALLY work well and which ones simply get in the way. I doubt many developer-type companies do these types of trials.