I agree with everything you've said. I think Fett's design (in itself) makes almost any variation look bad ass, even if not accurate. But with the rising costs of collectables galore, I think it's fair to say that we should get something that reminds us of what was on-screen. Body language and shape has all to do with that. My Fett still has a lot of work ahead of it but anytime I customize something, I go for shape/fit first. All the detailing and additions/subtractions come next. I also make me customs so they're just as durable as the factory releases...so it is possible to improve upon these things.
So far I love Sideshow's blaster, the shape of the pouches (one pouch flap is the wrong way still) and the direction the belt and sash are going.
I think Indiana Jones fans are facing the same thing and it will only be the swap out of parts and futzing (sometimes to the extreme) that will make the 'perfect' figure.
I hate to pick on the guy who put lots of work into the Indy below (left) but you can see what I mean about shape/fit being key.
In progress Fett: