Hm, I thought since bananas are monocots, (one growing tip) if you cut the one stem, you might get pups arising from the roots, but the stem won't grow back. I had a big clump of bananas at our other house, and we used to cut back the big stems after they fruited to stimulate growth of new pups. The cut stems never grew back.
I agree those ones of yours need much bigger pots, Xeranthemum. Bananas are heavy feeders and need a ton of water, too. Once the weather settles in to be warm, they'll start growing and looking better. I'd pot them up and not cut them.
