GTR has all the weight of an electric, without the instant torque.
(how do you like me now)
I'd take a lighter car for performance and handling (as well as the cost of consumables) any day. Braking and turning will be night and day different for 400 fewer pounds and a mid-engine layout, unless they really screwed up the Vette's suspension - something that it does not appear they have done.
Kudos to GM - looks so far like a respectable entry. We'll see how it fares (value and reliability wise), but it seems to make a great first impression.
But you might be right to wait until 2022, as there will be better variants coming down the pipe. Whether or not they keep the relative value that this car represents in future, remains to be seen.