Conceptfly and I have talked about the offline a lot, and agreed that a hardcore racing mode (aka time trial, no weapons) for all the offline tracks was a sorely-missing aspect of the game, and one that would've made it a lot deeper than it is already. We've been going back and forth on the checkpoint leaderboards, so it's great to add you to the mix.
As for the weapons, it's similar to Wipeout but a lot more pronounced, due to static placement of the powerups. Usually if you can survive the first half lap, hitting your lines will help you break from the pack. There's certain tendencies people always have (like lining up at a distance to pick up a certain powerup) that you can rely on to use offensive/defensive maneuvers. That just comes with time.