I would love to see the Live instruments and effects available in VST format for use in other hosts, available for sale separately and as a bundle. Extra revenue for Ableton.
I realise many of the instruments already have their VST counterparts in the AAS catalogue, but Operator has no counterpart still and the AAS "versions" are different aesthetically and practically. I also realise that many of the effects are available in numerous guises, but none actually have a true VST version.
Additionally (and very much out on a limb here), I think it would be great to see Live itself as a VST - of course, a very much stripped back and simplified version: just Session View really with use of clips and realtime timestretching and its effects and routing etc. Or even more simple than that, but with the essentials of live sampling/looping included.