All of the imagery seems to be about the same vintage, somewhat recent but not enough to have the completed rotary. I tended to prefer the alignment on Mapbox and Bing.

No problem here.

No problem as well. I also was not sure if and what to change the tagging on the roundabout to as there were a variety of highways going into it.

I left all the tagging alone. I just focused on correcting the geometry. The bypass itself was involved in a relation I did not want to deal with.

This appears to be a residential area and not a park. I have mapped every park that Westland has publicized. It would appear that this should be removed unless there is a some reason to keep or change it, .e.g., into a landuse=residential.