I think Rebuild is fine. Rebuild games are not that difficult, but it is far more skippable than people think (perhaps you only go for it about 90-93% of the time), quite often the other strategy can actually beat Rebuild, and even when it can't, Rebuild games aren't that boring. I mean, there are still far more decisions involved than there are in, say, Smithy variant/BM, and some of the decisions can be quite interesting and sometimes even counterintuitive.