Well that's where you stop getting exp but you can still push your guardian to lvl 30, plus its gonna be a lot bigger than ppl think we weren't able to do much in the beta cuz let's face it enemies with question marks as lvls kinda scares me lol but I can't wait to fully explore just how big destiny is and will become, so don't fret it's only gonna get bigger and better (not to mention harder) i hope to see you there