Hi,
Yes I think it would work.
I opened one of my files with a mix of edges and triangles and this is what I get when I’m viewing the data with wireframe and a custom Line Width after applying the filter:
As you can see it works even for the triangles. The only thing to be aware of is that the filter uses some form of averaging to transfer the cell values to the nodes, so some sharp transitions might be smoothed out by the process… but it is still better than the bugged alternative:
I hope that works for you too! (note it will also work for suface instead of wireframe.)