I would think that if your alignment was that off or tierods that worn, you would definitely notice some drivability issues --- wandering, in-precise steering and the need for constant correction; this on top of the usual tire wear that would be associated with alignment. I still can't believe at 66k your wheel bearing was toast....I'm at about 115k (187k km) and mine are still silent.

When you got your wheels RF balanced, did you get the results? I know with mine, while one was a marginal pass, it was still out enough that would have been felt on the roadster speed.

So to get to your list....
1) doubtful, wheel bearings generally make noise when worn.
2) again, doubtful, you would notice your x wandering around with loose tierods.
3) Maybe, but unlikely. The first sign of this causing any sort of issue would be evident on the tire (cupping or uneven tread wear). As with #2 though, if it was that far out, you would/should be able to discern something is out driving around.

I stand by my opinion that since the wheel is not translating any of the vibe, that your issue is not in the front but elsewhere...but I'm not expert! Lol.

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