Glad you are enjoying the car dude.
Coilovers make the M3P a completely different monster, trust me, worth every penny. I would recommend MPP Sport or KW. If you want and if you can swing it, I also recommend wheels and tires. Differentiate the car from the rest and it improves the handling significantly.
I think I am leaning towards:
MPP Sport coilovers
Solid LCA bearings
Debating between the compression rod inserts or going for the full bearings
Titan TS-5 20x9.5
Michelin P4s
I already bought Michelin PA5 to put on the stock uberturbines for winter wheels.
It's a lot more than I wanted to spend, but I think if I do this I might be able to get around the carplay issue and keep the car long term instead of my plan of switching to the BMW i4 M50 whenever they are available. Experiencing the difference in weight between the Tesla and the Golf, I don't think I could deal with another 1klbs added on for the BMW even though it has more top end pull and a better interior/infotainment.