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I don't think we should have this feature. In my (limited) experience at Stack Exchange, when people suggest moves to other sites they, by and large, do not know the proposed recipient site's mores and topics to know whether the post would be wanted there. And even when it a certain question would indeed be appropriate on another site, which is a small minority of off-topic closures, there's no great loss in not moving it thither: one can always inform the asker that, though the question was closed as off-topic, it's topical at site X and he should ask it there. I think the false positives, proposed false positives, time spent reviewing proposed moves, arguments, etc. are not worth the small benefit in having this feature.