The cheapest £50K version is RWD with 315bhp, 5.5 second to 60, so hardly 'slow'. It comes with 12 point memory seats, free for life autoupdate via built in LTE, keyless entry, auto xenon headlights, lane departure warning, folding mirrors, parking sensors/reversing camera....Essentially everything you expect from a luxury saloon.
The problems is options crep - for 'just' £13K more you get 417bhp, AWD, and 4.2 60 time.....and than 'just' another £17K gets you the crazy P85D.
I mean if your going to spend £50K+ on a car, you might as well get the best version you can afford
I am not saying its not worth X but the technology hasn't come far enough forward yet. I am sure it will soon though.
The Tesla works for me but no offense but your leaf doesn't. I couldn't drive a boring car 5 days a week just so I could have a fun car on the weekends.