I actually love the tribune! I grabbed it the first chance I could (something I don't do too often), initially with the plan of leaving off the canopy. After assembling it, I changed my mind and kept the canopy on. I too wish the canopy stands had been sturdier looking, but it is such a small detail after you've loaded up some furniture and klickies!
I'm far more bothered by the flimsy posts of the newest canopy bed, and grateful Playmobil did not try that with this set. My castle could definitely use a second tribune, though i don't know where it would go.