Science & Industry

For the OP we don't need Tech III anything. I believe Tech III is currently reserved for Strategic Cruisers and they plan on keeping it that way. Just because its Tech III doesn't mean it's magically better. If anything it would probably have worst yield.

This is what the current techs represent.

Tech I = durable, can actually be overheated a lot longer compared to its Tech II variant and is cheap to repair.
Tech II = specialized, doing just one thing really well. It's delicate build makes really sensitive to being overheated and expensive to repair.
Tech III = Strategic Cruiser sub systems.

What would be a better idea is if they added in higher meta versions of mining lasers. Like faction, DED, and officer. So instead of tech III they just just allow you to overheat your current mining lasers, and maybe add in a few new skills for doing so on top of the current overheating mechanic.

Also saying you just want to get technetium from asteroids doesn't make any sense. Why not any of the other moon minerals? Wanting to be able to mine it just because its the most valuable moon resource will not win over any arguments to do so. While I personally would love it because I mine. It's a stupid game breaking idea.

CCP already said they plan on adding planet ring mining and you would get moon minerals from that.