I hear you; but as I said, it's entirely what you're comfortable building. If you want to use your 3k magic item to obtain some form of wand / stave / (insert spellcasting item here), you can add a decent amount of longevity to your build.
Now, as to the low point buy- I'm getting that it's a lot lower than most games out there, but it's honestly the point buy that I've had the most fun playing in the past. Especially when you add in traits to further specialize your characters. My logic when writing games has always been that Pathfinder is a system that really rewards focused, specialized builds- and a 15 point buy generally puts players into a position where they actually have to give something up in order to be able to do that. Meaning you very rarely have someone who's capable of "stealing the show" from other people in the party- everyone has things they're good at, and things they're not good at, which ((ideally)) generates situations where people in the party have to rely on each other to accomplish specific tasks. Sure, the rogue can crack the door... but with a -1 hp/level because of her 8 con, she needs the Barbarian to clear a path.