I think you would soon need a non-mini engine to keep all this lot moving! A screaming A series with 140hp defies the image of quality, modern motor!
I am seriously tempted by electric windows and central locking on mine. Ideally, I'd redesign the dash, get rid of all the buttons as well. The brake test switch is next to useless, the lights can be added to the left hand stalk easily enough, the hazard switch could have its own place on the dash, the heated rear windscreen and rear fog light switches could be moved to the RHS of my steering wheel where the front fog light switch is currently located. However, it would reduce the value I think so I won't do that ![:(](https://www.theminiforum.co.uk/forums/public/style_emoticons/default/sad.png)
In addition to the above, my ideal mini will have heated leather seats, a modern lighter weight heating system, electric buttons for the door release, and heated wing mirrors. I will one day have enough space, money and time to build said mini.