I am one of the developers that worked on Sky Rage. Thanks for all the feedback, anything helps!
Your issues with the "jagged look" and the "delay in which they take render" stem from the limited processing power of the iPhone. To fix the jagged look we would have had to implement a ton of anti-aliasing on the edges of the buildings in order to make them appear to be smooth. Unfortunately, our test phones were running at about 20 - 28 fps without anti-aliasing, with anti-aliasing the they were running at about 12 - 14 fps which is terrible. We really had no choice but to leave it out. The delay in rendering is actually not a delay, but a distance culling technique. The iPhone 3G is only really capable of rendering about 10,000 tri's and vert's per frame. Our level is so huge that if you could view the level from one side to the other, the iPhone would need to render over 40,000, and that is after a ton of optimization! So, in order to fix that problem we only allow the player to see a certain distance in front of the craft to keep the app from literally crashing.
Thanks for the feedback on the radar. Originally we had implemented the standard circular radar, but our test groups said it took up too much of the ui so we dumped it in favor of the screen edge radar. We are working on a ton of updates, and one important update is a cockpit view. It is possible that we can put a circular radar in the cockpit view and not get in the way of the players view.
Your comment on the time is definitely becoming a common complaint. To address this problem, included in the first update will be a hefty starting time increase. We hope to get the first update out asap, which will also include a ton of performance enhancements.
Don't give up on the game, because we have a bunch of new features in dev and have no plans to abandon the app. One notable feature in dev is live mutiplayer, which will allow you to fight against up to four other players live in your choice of five different craft.
If you have any direct questions or comments, please post them here or at
http://www.dionysusinteractive.com/ContactUs.aspx.