1. I would do this once the mileage got high enough to make you nervous.
2. Good choice if you can find a proper way to stabilize them on their mounts since they are larger and probably more weight.
3. Any shock that stops the jarring of the OEM shocks. My Ohlins work great, expensive, yes. They have a dealer in the USA, maybe made here, so purchase was easy. In Europe there might be good alternatives.
4. I changed the cam and it works well without the unlocked ECU. I might get more power with it unlocked but it works well as it but shows a code light of "reached max limits", but I don't need more power. It runs soooo smoothly now. Probably the way the engine was designed and then detuned with the OEM cams for the EU Pollution spec.
5. My 2019 steering is just fine; my only gripe is that it takes forever to turn it around, as a fellow MOG owner, "the 17 point turn".
6. Buy is to do once you start hearing the clunk coming out of the differential (BB) area. I heard the clunk a few time and wondered what it was until I read the notes on the NVH. The kit is easy to install and saves weight. It also makes the clutch feel more like a regular clutch and not a device hooked up to a pogo stick.