pretty much yes. Thanks for posting that - as I totally left out bump stops (like on the pinion, but also, more broadly for all cars of all makes in general any bump stops - some control arms have them - of course we're mainly looking at the rubber bump stop on top of the strut tube/insert, which basically is the same thin don a different way)

Tension rods/caster bars/brake reaction rods (there might be other names out there for them too - anyone care to add to that?) CERtainly rubber for 99% of cases, but I'd again suggest the half and half option for that specific bush/component.

I suspect a good 'case' could be made either way for leaf springs. Whilst most would tend to go urethane all round on that, one might also look at using a urethane bush at the front leaf eye hole, since that takes most of the load (esp when the car is moving - the rear wheels 'push' the car forward through that front leaf eye bolt. The rear eye/bolt is (relatively) less stressed - along for the ride, at least as far as drive forces are concerned (still obviously gets put under stress with suspension compression/holding the car off the ground) Running rubber bushes for the rear leaf eye etc, might give just a bit more compliance. If tht is the case, then rubber vs urethane could be experimented with. The difference here would be that urethane all round would have more resistance to body roll/twist of the leaves - so it would have slightly more of that 'pseudo' sway bar effect. Rubber rear bushes would be like a little smaller diameter sway bar equivalent effect. So it could be used, theoretically, to alter corner exit (in particular, but also mid corner) oversteer.