Agree about Siddle. I think he's one of those easy to hit guys, has a nice speed onto and off the bat. I think he's a Test only bowler, and even then I'm not his biggest fan.
Last night again we saw Smith AND O'Keefe bowling less than Dave Hussey. Now I know exactly why that is...because Ingram, Duminy and Miller are all lefties. It's a captaincy trend that I'm getting sick of - how the hell will Smith and O'Keefe learn to bowl at lefties when they never get the chance? Captains are all 'no we need to spin it away from the bat' even if it means bowling Hussey instead of a better spinner.
As for Smith in general, well it's all about development and hoping that he fulfills the talent he has. It's the same reason Pattinson and Cummins get picked ahead of many other capable bowlers - the selectors are hoping to see talent turn into actual results. But I think you're vibe is right, we're at the point with Smith where he'd be much better off playing domestic cricket - he just doesn't get the opportunities to improve much in these games.