I've gone the full custom action route several times, and other than the effect on my wallet, I haven't seen any concrete POSITIVE results.
Custom actions come and go in the market place as they really offer nothing but the novelty of "something new" when they hit the market. Some folks buy them and then reality sinks in............
These look nice, but the proof will still be in the pudding. I doubt that the pudding will be filled with very many extra bananas at the end of the day.
As an aside, a couple of very good smiths that I rely on their expertise and knowledge have told me in the past few years that the newer CNC Rem 700 actions are a good as any custom actions costing far more that they've worked on. Go figure.........
Carry on, troops......