You still can change the order in the batch-menue in ARTLANTIS 6.5 when a project is opened - looks like the old one! Just refresh in RM and the new order should update.
And I have to agree, that important infos are missing in the Render Manager, like the estimated time (which often was useless though), etc.
For VR-Objects, I don't get a preview pic in the RM, f.e. but you can still look them up in the temporary folder.
And to be fair, the VR-object render-time has been reduced immensely imho!
In general, the new RM interface (UI) needs some optimizing and fixing, but I really appreciate the stability of 6.5 now.