McLaren are a fabulous drive. The steering and chassis are supreme, particularly the adjustable suspension on 12c/650/720.
McLaren are a different ownership experience to Lotus and Alpine, particularly Alpine which is effectively a mainstream product from a large manufacturer, albeit a rare car but you would be very unfortunate to experience any reliability issues (minor niggles at worse). Evora likewise really does not have significant maintenance issues. A few problems for sure but for a bespoke sports car, pretty good. Emira I suspect the same, though it looks heavy on paper so it will be interesting to see how Lotus lose the bulk at the steering wheel.
McLaren are still learning how to build cars from a standing start in 2010. They do have issues, regularly, though 3,000 miles pa you may not experience so many, if any. The warranty is a bargain at £5k pa, so that tells you something and I wouldn't entertain owning one without a warranty. You have to be really 'invested' emotionally in the marque to enjoy the ownership experience, so you can readily forgive the various issues that are almost inevitable. If your driving priorities are steering, supple suspension, nibbleness, power and ease of use (parking excepted, doors can be an issue), there is nothing like a McLaren.
The bargain is 12c. Still available with McLaren warranty and the adjustable suspension is brilliant. Turbo lag adds to the drama. Get 2 year McLaren warranty in the deal if you buy a McLaren.
Remember, the McLaren new was a very different price-point, so although the man-maths is suggesting it is in some way comparable to Alpine and Lotus, the reality is that it isn't. The 570 price new is also an illusion, as it effectively was subsided by the development costs of 12c. 570 as a brand new from scratch model would have to have retailed at £170k+.
And don't forget, if you thrash a twin turbo McLaren, you're in single digit MPG. I did a tank in 80 minutes on the autobahn and the tank ain't small.
Conclusion: McLaren for the ultimate driving satisfaction. Lotus, Alpine for as close as you can get but with a significant reduction in wallet anxiety.