knowing this topic needs in own thread...i cant resist...
Having worked as a consultant for the FAA for many years, one thing i've learned is very clear. They are very slow and cautious in making changes to rules and procedures. It's just its nature because their primary purpose and reason for existence is safety in the air. Can the height limits be changed? of course. And controllers will be able to deal with it and keep the airspace safe. I've been impressed for years by controllers ability to direct traffic under any circumstance, its quite amazing to watch. But changing height limits will effect controllers flexibility in vectoring aircraft, and if they have a choice, as they currently do, they have no motive to change current rules. A mountain near an approach and departure pattern is not exactly something they can regulate, so they deal with it.
But i think it will eventually be adjusted some day. Economics drives all and will dictate when, as everything else. Believe me, when there is an obvious economic benefit for the city and the airport, this topic will be seriously discussed. we're just not there yet.