I would not disqualify this. Swap to XMR and back (via multiple transactions over some time) is similar in result to doing coinjoins. It's a valid approach. For the direction XMR-BTC you may be even able to already use atomic swaps, but that's not yet well tested process..

I recommended this elsewhere: if you want to learn about privacy and anonymity tools, learn from the people who's life literally depends on it, e.g. dark market vendors.