Guess I should have prefaced with saying that the "More like this" links are from Longview, not my own stuff. Also, when you mouse over a graph in Longview, it does this:
http://i.imgur.com/eY7qcEF.png. Which I think alleviates your concern of less data.
As for the first group and the current Linode Manager, there's no sorting other than by the groups I've set up. It would be nice to have sorting by data contained within each Linode (such as CPU, Memory, Location, etc.).
I think having the Linode Manager look more like Longview using the data that isn't a part of Longview would be helpful and I think the Longview interface is something to strive towards.