Build quality from the earlier ones remain on the Model 3 and Model Y. They aren't really put together well, and some of the panel lines out of the factory are appalling. But at £40k, they need to be considered as a cheap car, not a Bentley. And at then end of the day, if its a 2/3yr lease, who cares, as long as its comfortable enough and does what you want. Treat it as an appliance, and its not your problem to sort when bits drop off - hopefully not in the 2/3yr lease mind.
Even you wouldn't be able to get claimed range, and remember they prefer to spend most of their life between about 30% to 90% battery. Also remember that home charging will likely give you only 5 hours of 7kW charging, so not enough to "fill" it from empty. Shouldn't be a problem for commuting etc, unless things change, but in some cases you may not be able to fill it up enough to cover daily use, so as the week goes on, you may find yourself getting lower on charge.... ...or suck up peak rate charging and/or public charging, both of which blow the maths clean out of the water.
Addiitonally, I seem to recall you do a lot of the M3 on your commute. Motorway speeds muller tha range.
Lastly, if your missus has to drive it about, don't underestimate the size of the things. They don't look big, but compare width and length to that of your car

. Remember, driving back from the pub is definatly women's work.