The way I see it, the new added UM4.6K Pro features do not make it any less of a cinema camera but do a hell of a lot for making it a more than acceptable ENG/EFP camera now. It is what should have been released in the first place especially since there was the year long GS/RS shutter debacle we had to endure.
These technical developments didn't happen in a vacumn over a weekend, so if BMD was going to be fair dinkum to their loyal customers and knowing how many had been clamouring for a ND filter wheel, ext power switch, interchangeable lens mounts, etc, etc, etc, ...... they should have been straight up with us and said "hey gang, there's an upgrade in development that would address these issues but albeit at a higher price".
Hell, I would have waited another year and paid some more too! Unfortunately, communication isn't one of BMD's strong suits!
P.S. - they still insist on calling any power that comes in from the rear XLR4 as A/C with no voltage display ..... which is useless when doing Steadicam and getting power from the sled batteries.