Empire Tree tweaks FTW
A couple of suggestions for future diplomacy patches.
The first suggestion is a new feature that I think would be nice to have in the game. I use the option of queuing targets with the shift button quite a bit and would like to be able to see the ships that I have already queued in the empire tree. I thought that this could be shown with an outline (around the icons in the empire tree) and perhaps a small number for the queue order. Alternatively I thought that the outlines of the queued ships could have lessening degrees of brightness to communicate the order. Not a big deal but I just thought that it would add to the already excellent interface.
The other that I'm almost positive has been pointed out somewhere (and is also minor), is that fact that the empire tree backdrop in diplomacy doesn’t cover the entire fleet. It just needs to be extended to the right a cm or so.