Same goes for the KW DDC system and the only difference between those two is, the KW DDC allows you to make an adjustment on damper settings with factory buttons/screens and smartphones, while the TEIN's system gives you the ability of adjustment only via its own control unit.
As for the stock dampers, I would say it's okay or acceptable on tracks. So there is not much of a reason to change it if you track once a quarter or less, just like the brake caliper. However, it's still far from the best or great, so if you track once a week or similar, you would benefit from quality coilovers (not just on tracks but also on public roads at the expanse of easiness of adjustments), just like the brake caliper (which could give you better modulation, thicker or better performing pad options, etc). I fall to the latter end of spectrum but haven't changed both because I mostly track my other cars and there is no quality coilover manufacturers in Korea.
There is a simple non-adjustable type camber plate built for OEM shocks (I have one but haven't installed it yet), and there is no adjustable camber plates yet at least not that I know of (but it can be built in a custom build fashion).