I have to say I, too, would be tempted but the price will be a big factor. I would not expect the new CX Plus 4 to be less price than the current Roadster. I predict it will start around £62/65K before the inevitable addition of extras to personalise the car (as we all do!) and that can easily bring the cost up to £70K. At that price I will probably hang on to my Roadster, which I have spec’d up to the hilt including ECU upgrade as well as suspension mods and which I really do love.
Maybe wait a couple of years until there might be a few on the market second hand in the £50 to £55K range, which would then be tempting.