I know that I'm not a Dino builder, but until money and the wife interjected i was doing an MR2 project similar to this. (LONG story!)
TBH i don't mind if this is 100% accurate as the vast majority of people aren't going to know the differences anyway. i.e. look at the 355 and 360 replicas. Largely accurate in the majority of areas is going to be good enough for most people.
I personally think that this is an interesting addition to the whole kit car scene and an angle that we're going to see more of as people don't want to go the whole IVA route.
Then there are all the possibilities that this creates as new blood comes into the scene and hopefully that should bring with it innovations that all Dino builders can pick up on.
As far as the price is concerned, you only have to look at what MR2 based Murcielagos are going for! (generally £30k+ and a few for £40k+!) Japanese reliability and running costs with Italian looks is quite an appealing prospect
And as for the donor, the imported MR2 turbo is already quite quick and can be made "very" fast with tweaks and then the MR2's that have been converted to the V6 bring a whole new angle and exhaust note, especially with the big Lexus V6 fitted!
I think that we have to respect that this is never going to be a route that everybody likes or agrees with, but each to their own i say