I've consolidated all my outputs a few years ago, for close to zero fees. So yeah, I'd simply wait for that if you haven't done it yet. I also don't really care about privacy, all my KYC coins go into one wallet group for hodling, all others are in a separate group. The tax authorities know that I have bitcoin, but they never asked for any detailed information. If they ever do I'll give it to them and spend coins accordingly. If you have specific privacy concerns, what are they?