I think it's perfectly happy too! If/when you decide to change something, here's some thoughts on different things you could consider:
Move it to a hanging basket.
Adding a 2nd, upright little plant might be just the thing. I can think of these that I think would look cute, don't mind lower light:
Joseph's Coat (Alternanthera ficoidea)
Red Log (Peperomia verticillata)
This could add cuteness at soil surface, though kind of a dangler also.
Artillery Plant (Pilea microphylla)
A little palm tree, Dracaena, Cordyline.
Ponytail palm could add something very interesting at the soil line, the bulbous trunk, then the poof of dramatic foliage at the top, while still being able to see the Columnea stems well, to appreciate all parts of both plants. Thinking the "poofy" kind, not the curly one, for this particular vision.