The Hipshot is definitely the only irreversible replacement besides Dane Wilder's custom modifications of the stock tailpiece. I have spent many hours thinking about alternatives in the past... they just don't exist as far as I know.
I find the Hipshot saddles' problems really annoying and yet it is overall a pretty good design barring this recurring "feature". Even if you have a very good neck angle problems can develop easily enough (I used to think it was a neck angle issue as many perfectly playable Rics still have a rather low neck angle, but I later realized this was not sufficient explanation as I have a strong counter-example in my possession).
People already mentioned the threaded saddle height adjusters moving over time, but the other problem is the saddles side-to-side movement which is a tone-robbing energy pit when you are playing. It is possible you will never see it, but I can always hear some amount of it on strings with lower break angles (i.e. the G string) if the saddles aren't shimmed. I always shim the saddles with small aluminum washers to prevent this. They are held in place by the tension (the last washer should be a very tight fit). As for those threaded inserts, a microscopic amount of glue seems to the trick in my experience.
I remember once I sold a Hipshot and a height adjuster worked its way out in shipment... they buyer (an RRF forum member) accused me of negligence but later found the adjuster in the packaging after I asked them to give it a close look. I guess we should all be shipping these bridges with a small ziploc bag around them so no small parts get lost.
I do agree with calls for RIC to phase out the stock bridge except on vintage reissue models (let the purists keep it this way), but it's not a hill I'm prepared to die on in this forum, so I tend to keep quiet about it. (I also think some people who complain about the stock bridge really exaggerate its deficiencies so sometimes find myself coming to its defense.) It doesn't matter how much we kvetch anyway, as long as 4003s are continuing to sell the market has firmly told RIC not to mess with the formula too drastically.