Still new to this game but a few thoughts:
I have a Moreo tuned Savage target action:
It has a little "bump" in the opening of the bolt, but otherwise is right there with the custom actions I have felt. I don't know if he gave this action a little extra "love" or not, but it is slicker than two others he did for me.
Applying some of my learnings (Jackie's approach to 133 and the ppc to 135 and the br) from shooting/loading my "custom" BR ppc to the savage 6BR, it is respectable in some winter testing. I am the limiting factor.
The floating bolt head has some merit, especially in regards to cost effectiveness of OEM manufacturing. I have been told that one of our custom action builders has prototyped this design and was surprised at the lug to action contact, but couldn't see a real world difference in performance. True,,, don't know, but heard it two places.
I would not discourage anyone from getting into this sport if this concept fits their head and budget, just be realistic with your expectations. I might try it on a heavy (presently 15lbs+) for local club br use after I convert it to ppc.
But at the end of the day, it doesn't cost that much more to just build around a true BR action after the expense of getting a savage tuned up and installing the 2 oz. trigger.