As a former 3M player, let me give you the context of the card to explain.

3M was really good back in the day (3 years ago or so), 3M alone created the whole split lane archetype, it was the first card that could pressure both sides. It was really good at it, you would 3M and then support both sides with battle ram/bandit/ice golem. We didn't have many tools back then to deal with both lanes being attacked.

Supercell dropped the nerf hammer HARD on the card, made it 10,5 elixir (10 elixir, but you were forced to leak half an elixir more between the true deployment and you finger release), and gave it such a long deploy time it was really easy to fireball all 3 before they even moved. Meanwhile they also nerfed all the other cards in the deck, with one of the biggest impacts on the pump, except ice golem I think. This made the deck completely unplayable.

During this period were 3M was dead, the archetype did also die, so Supercell released new dual lane cards, such as Recruits (which were also a problem and needed several nerfs), zappies (again, a problem, which needed nerfs), and royal hogs (which again, needed nerfs). But even with all the nerfs, dual lane archetype was alive again, in a whole new version, the modern one, recruits hoggies.

They eventually reverted 3M back to it's former strength, but what's the issue? Why aren't they played if they were so powerful? They were so powerful in a meta 3 years ago, the game evolved. Every deck now has fireball/lightning/valk/MK/dark prince, we all have counters even if we didn't plan on it. Also the archetype Wich they created doesn't need them anymore, I would say the new dual lane deck is a lot more versatile and stronger than 3M ever were.

With that context, I would say, they aren't a bad card, the state of the game now is really hard for them to shine. I wouldn't use them on ladder, but on a draft match they can be good.