Kate, As mentioned in 'Mobility Aids Aimed At Helping Us Age Gracefully' you pointed to, the balance between functionality and "not losing face" is very important. I like how adding a little bit of style and a touch of added functionality makes such a difference!
Hi Katlyn, More than alleviating them, something like your insole could be a very useful tool in preventing injuries before they occur; identifying potential problems with a runner's form (e.g. overstriding or overpronation) and suggesting improvements. Optimising their form and efficiency. If the runner has a device with them (phone or smartwatch and headphones) it might even offer live feedback on the data it's collecting? Which reminds me of this AI personal trainer (http://www.getvi.com) that is in your ear while you run, encouraging you and making recommendations based on your pace, heart rate and personal goals (and other data). Something like your insole seems like it would fit into that model very nicely!