The opinion of a park builder:
You should never complain when your park crew gets creative. Sure it may be hard to dial in your X-on, X-off on a crazy creative jib. However trust me, everybody's already seen somebody else doing that X-on, X-off a million times, and it's way more badass when you figure out something new and different to do on your park's creative jibs. A simple trick on an unusual park feature is just as cool, and usually cooler, than a difficult trick on a simple setup. And once you can slide that up-flat-down-C-down-flat to butter box with ease, you'll be surprised how easy it is to slay a down rail. Working on your technique on the harder setups will improve your performance on simpler jibs.
That said, every park should be be built keeping the progression of the riders in mind, and should include easy features as well as difficult ones. In my opinion no park is complete without a simple flat rail, down rail, flat box, and down box. Install those four basic elements, and THEN get creative.