I watched the Chris Harris on Cars vid (posted above) last night and it's given me a different perspective on the Jaguar re-brand and i can see where they're probably trying to go with it.
It may well be that EVs are no longer going to dominate the future of car buying, but in most places there is/there will be the infrastructure for EVs to exist alongside ICE and hybrid cars. Jaguar had become lost trying to compete against BMW/Merc/Audi/Cadillac/Lexus etc etc without the resources those manufacturers have behind them. By trashing what they'd become they can reinvent themselves and become a niche manufacturer selling with a one or two car range of higher end, lower volume models, instead of the seven(?) models they were trying to compete in crowded market segments with. That's what they were in their 60's and 70's haydays and i suspect that's where they're aiming for now.
The brand was strangled by Leyland and Ford didn't really know what to do with it or seemingly understand what the brand was. When Tata took it on it's heritage had almost been lost. If the strong Land Rover/Range Rover side of the business can prop it up, Jaguar can become a low-volume halo brand doing it's own thing once more, not looking to compete directly with anyone else. A fight it's always going to struggle with.
All the pre-production tests i've seen/read so far put the car in a really good light as a drivers car, so if the final production car looks decent and they can put all that bad rebranding publicity behind them, i can see this working for them. I don't feel the brand could have survived without a drastic direction change.