Shadowcat, I hiked in low-risers or mid-risers (a step above trail runners) and was fine. In Yosemite I hiked similar slopes with my full backpacking boots on and felt more comfortable. I wouldn't change into anything less than the low or mids, and definitely wouldn't lug them along. The slide is 75/25 skree to slab and I would rather have more protection for the ankles, since you will be slipping and wading through stones sometimes ankle deep. Just my thoughts, if you carry them along at worst you'll get a little extra workout...
As for the name game. I hear you, Grump. To use the parentheticals does re-inforce the old and new names and provide context.
However, I rarely preface my use of Carson or Grace, and have found it not to be alienating or discourteous. Usually it is provacative and elicits puzzled looks, questions about "what mountain" and then (after hooking them and giving them the pitch as to why there is an effort to remane them) a much greater understanding of the issue, those two mountains, and more importantly the stories behind the people they should be re-named for. People are curious by nature and usually jump on a name or phrase that they haven't heard before.
I think with some people prefacing the names and others just using them by themselves will all work toward the same goal.
After all, you did ask what mountains? And received the answer. You then could have said what? why? when? And you would have received that answer as well, I'm sure.
In the end, we'll all be able to see how the process progresses... and then can critique it some more.