In general, tweaking the high-ping kick system to handle certain situations differently may well be beneficial. Some of us are limited to wifi connections, and for ETS, the EU servers are established as the place-to-be regardless of one's physical location.
For me personally (playing non-arcade in Germany via wifi), the current system already works quite well. On very rare occasions, it kicks me when my ping spikes significatly and exceeds the threshold for relatively short, but still slightly too long, period of time. This is understandable and fine as it happens so rarely. Nonetheless, having the connection kept alive a little longer, e.g. in non-collision zones or when noone else is around at all, would be cool. Perhaps "simply" increasing the duration of a ping to be long enough to trigger the kick under those conditions would already help.
However, I'm not in favor of completely disabling the high-ping kick for any speed ranges or map zones outside of arcarde. While avoiding collisions may be feasible at slower speeds, players constantly having a massive ping can impede a smooth drive and, in general, doesn't feel immersive.