I wear Oakley Airbrakes, they have a lever, I have never broken a lever. Your straw man argument to launch in to a mini rant about freeskiers is invalid.
Change is easier? As if the old ones were that hard to change. The only problem left in the goggles is a real photochromic lens that covers a meaningful range of conditions- so far none of the photochromic lenses can cover storm day skiing AND a bright sunny day. None of the existing photochromic lenses can work well in a storm. I'd rather have Smith spend their R&D dollars on solving that problem. On the other hand, io7 is great news- the outdated iox and io will be sold for cheap.
Pretty much every quick change system out is light years easier than the I/O. I don't think Smith has the R&D resources to improve upon the behavior of the current photochromatic technology such as a company like Corning who developed it in the first place.
There are lenses out there that do a pretty damn good job at being versatile enough. And most high end goggles these days come with a couple of lenses that can cover the conditions.