That's a great looking plant
I think a broader pot is a good idea, as a wider mouth will make any root pruning or other work easier. We only have a few houseplants (because our cat hates anything that receives attention) but they get a bit of root maintenance done annually. It helps to keep them from strangling themselves and means I don't have to use more floor or shelf space than I want.
For trellising "lazy climbers", think more along the lines of an "H" shape - something you can slide under a branch or stem and then secure into the soil to support the weight.