Via in PCB - Why not go for a solid copper filled via than a plated via?
High-current vias are relatively infrequently needed.

If they are needed, and the current is higher than a regular via would handle, it is very easy to insert a through-hole pin and solder both sides. This guarantees good conductivity with no risk of inclusions in the via, and it can be done automatically by a pick-and-place machine and flow-soldering.