I think take lanes are a work in progress. Compared to layers there's plenty of pros (for me) and a few cons. Main cons being the arbitary height restrictions, lack of an automatic break open and maximise 'all-in-one' button.
Pros are the easier to use controls, the ability to name takes, no more random mixing up of lanes (aka the rebuild function), but being able to move them into an order that I want far easier, oh and the text notes field is a great feature too.
Ref 'rebuild' - it would be great to have a way of reordering the lanes into a user defined order with options such as ordered by some sort of rating system, capture order, and alphabetical to name three. Please not the old rebuild function though, I never did get what that was about.
I'm sure they'll develop as time goes on.