No this goes against everything people on the forums have been saying they want. This is why the call in meta was changed. People are sick a tired of being told that they can only play with a few commanders, or have to tech a certain way. Like i said Mine are and important part of CoH2 and were in CoH1, every faction in the game has access to mine with out tech, or commanders. All but the USF, so no just putting box mine in more commander would solve nothing, including the fact that you have to lay five in a clump to do any kind of damage to tanks.
m20 mine with RE's will not be balanced, imagine trying to counter harass with an OKW PIV and having the entire map covered with them by midgame. With Soviet/OKW/Ost mines you can limp away, but when your tank is immobilized it's helpless which can often spell the end of the game.
Having such a powerful weapon so easily available from the start with cheap units is not balanced, hence why reigels/m20 mines are locked behind vehicles.