There is currently a number of things going on re the future of Wiktionary.
There is, for example, the suggestion to adopt OmegaWiki, which could potentially complicate a Wikibase-Solution in the future (but then again, structured data is often rather easy to transform):
There is this grant proposal for elaborating the future of Wiktionary, which I consider a potentially smarter first step:
There's this discussion on Wikdiata itself:
And I know that Daniel K. is very interested in working into this direction.
Personally, I regard Wiktionary as the third priority, following Wikipedia and Commons. A lot of the other projects -- like Wikivoyage or Wikisource -- can be served with only small changes to Wikidata as it is, but both Commons and Wiktionary would require a bit of thought (and here again, Commons much less than Wiktionary). I would appreciate a discussion with the Wiktionary-Communities, and also to make them more aware of the OmegaWiki proposal, the potential of Wikidata for Wiktionary, etc. Just to give a comparison: it took a few months to write the original Wikidata proposal, and it was up for discussion for several months before it was decided and acted upon. I would strongly advise to again choose slow and careful planning over hastened decisions.
Cheers,
Denny