Usually, I’m all for suggestions that ask for more models in a building game, but the devs are already slowly working on furniture ( Art: Decorative Props concept art! (Massive post!) 4/13 UPDATED ) and the poles & beams were on development since pretty much mid-2017 ( Art: Decorative pole theme explorations! ). I’d say it’s a bit late to say they’re too thin, IMHO.
But you can wait for the totems ( Art: Decorative Totems (Trophies?) and Poles Update! [IMAGE HEAVY!] ), which might add something to your columns.