I would also like the ability to do something similar to the way a business can depreciate an asset over time. How about the opposite: IRS tells us how many years you can spread an _appreciation_ out over. Currently the tax code penalizes the guy who works below market for years and then sees a lump sum payday. Why should it?
That said, I'd be happy if we just did away with dual-basis of ISOs and eliminate the rube goldberg AMT credits.
One of the two major Presidential candidates (who shall remain nameless) has proposed capping itemized deductions at 28%. I think this idea is more or less a bipartisan compromise acknowledging the political impossibility of eliminating specific deduction categories (e.g. mortgage interest, health care expenses, property taxes, state income taxes), each of which has a very loud and vocal special interest lobby. If passed this would be an effective tax hike felt very acutely by option holders of acquired companies resident in high state income tax States (in other words, entrepreneurs in Silicon Valley and New York).