Triptych painting - are its days numbered?

Here is one of the "corner paintings" that I don't know what to do with. It's on canvas, so I could take it apart and re-use the stretcher bars. However, I'm in no hurry, because I almost like this one.

I painted this in 2002 (I think); it's the view from the Falls of the Ohio State Park Interpretive Center's observation deck, looking towards the Falls, on a rainy, misty day when the river was high. It is, to date, one of the largest single painting projects I've ever undertaken. In fact, it might be the biggest.

It never really developed in a way in which I was really satisfied, but I like many of the elements. I like the colors, I like the idea, I like how the bridge looks. I was very conscious from the start that it was a very minimal composition, flat and very straight-forward. The simplicity was on thing that I found interesting and challenging about it: how could it be turned into an interesting painting?

Unfortunately, I don't think I pushed it quite far enough. It needs more engaging textures and a more carefully planned use of color to really succeed, I think. That's one of those things that I think I'm better at now than I was a few years ago.

I like the scale, and I like the subject, although I'm still not convinced that the composition could ever have completely worked, even if the above problems had been taken care of.