A few things that struck me while watching the programme (for what it's worth):
1. Prior to watching the programme, I thought the cars seemed expensive, but having seen how they've gone about it, they must have lost a shed-load of money on the project. So it must be a promotional exercise, in which case the TV programme is clearly a part of that, and must appeal to people who are wondering if they would rather have a new Jaguar than something more sensible.
2. You could forgive Jaguar for marketing them as a genuine continuation of the original if they had the drawings, but the inference was that they didn't and were having to use the internet to figure out what the originals were like in detail - and that's just for the body structure.
3. My suspicion is that the engines (and other major components that would have been made in-house originally) were farmed out to an established restoration expert who is probably sworn to secrecy, because I don't recall any reference to how they were put together. Now that really does detract from whatever provenance might be attributed to the cars. If you can buy new E-Type heads & (aluminium) blocks from Jaguar Heritage or they machined them from solid in-house, then fair enough, but - if not - presumably the engines have been recycled! Similarly, many of the major components that would have originally been bought in by Jaguar from their component supply base and made to OE specification (Dunlop, Lucas, Smiths, Trico etc.) must be reproduction parts. That's okay for original cars because their owners have nothing to prove, but for a "continuation" it's all a bit sad.
4. The luggage and watches etc seemed to be being developed on the hoof (rather than being part of the original budget) and came across as an apology / grovelling "thank you" to prospective owners for buying something that they had every reason to doubt represented good value for money. (Not that they would, but if Ferrari did a similar exercise with the GTO, or Ford with the GT40, they'd be confident that they could sell them several times over at more than twice the price, and make money on them without any gimmicks.) All of the formulaic TV drama aspects (and much of the dialogue from their employees) just suggested a lack of confidence in Jaguar's ability to make and sell the car.
5. If (as suggested in the programme) it would cost £40,000 to re-spray a damaged bonnet to the standard of finish that they've achieved, then someone's lost the plot. I wonder how light these new Lightweights are with their oodles of filler and paint layers. (Mightn't it have been more cost-effective to have made the panels better in the first place and given the car a quick coat of protective paint?)
A very attractive & expensive ornament and probably a safe investment, but as a car it's not a classic and it hasn't been made for racing. I would suspect that it can be road-legal as different rules apply for low-volume production cars, but, if not, then even its appeal to poseurs is limited.