Why 2 of 3 multi-sig? What benefit does that have over 2 of 2 multisig? That's just adding an extra layer of effort and complications. Who would be the 3rd co-sign? Its just adding more potential cost and complication.
The benefit of the 3rd signature would be that it can stay sealed somewhere for emergencies (your death).
Again, it's 2 of 3. So you can use the 2 signatures in the way you use now and the 3rd is for the case one of the usual signatures gets out of reach.