Thank you. I didn't get much feedback on LT, only one person spoke up about doing this. However, these are only present on MY12 and newer Evoras. There is also only one vendor that sells the line to delete it (InoKinetic). Kind of surprised BOE or MWR doesn't sell one. I'd be curious to see one of these clutch dampers cut in half to see what's inside. Is it actually restricting flow, or does it use some sort of diaphragm to dampen pulses/vibration in the clutch fluid, etc. On a BMW, it is restrictive, but it literally is just an inline fitting with an orifice/flow restrictor (a hole much smaller than the ID of the clutch hose). Even so, on my E46 M3 I never had high rpm mis-shift/grinding issues with the delay valve in place. Removing it just helped clutch engagement feel/predictability.
You are probably right. It may just be a matter of cable adjustment. Even with the gearbox fluid nice and warm I still get the high rpm grind/mis-shift if I don't slow it down a bit. As I said, my car shifts smoothly the other 95% of the time, but I will definitely have the cable adjustment checked next time I take it in for service.