This is the wrong car for you, sorry. I have owned 3 MQB cars (2x bolted / tuned Mk7 GTI, and an S3 which is a Mk7 R), all 3 with DSG. Spent the last weekend logging about 100 miles in my friend's tuned mk7 R. We currently still have an Evo as the weekend car and I have owned near 30 tuner / performance / higher end sports cars. I love my Mini SE, and it's perfect for my life but this isn't the car you're looking to replace the R with. I also work for an auto manufacturer and drive around in 800-1,100 whp EVs daily. I've got coilovers on the way for my SE, but it's never going to be more than a quick car that can be fun in the canyons.
Additionally, if you don't have 220v/240v charging at home to charge to 100% every night, doing 100 miles in this car is going to be brutal. You are a traffic jam, hot day with AC going, or cold day away (heck, even one errand) away from having to add a charging stop every day. Yes, fast charging is widely available now. The 800v / 900v architecture cars that can accept 300+kw to charge and add 200+ miles in 30 minutes give me no fear to charge daily if need be. But the SE only can accept 50kw max charging.
Lastly, if you don't like it, you will take a huge resale hit as the used buyer cannot recoup the $7,500 credit and will expect to pay well back from the value of the car.
tl;dr: I love the SE, love EVs, but this seems like the wrong fit for you.
Now there's a different point of view about transitioning from a tuned R to an SE! Have you checked what used MINI Cooper SEs are selling for?