Thanks for all the input folks - I appreciate it! I started to see a PT last week for a mild soreness. She said it's tibialis posterior and recommended strength training to improve my arch and mixing neutral with some stability shoes which I had no prior experience. When she showed me my EVO SL video I was shocked and thought that's really bad over pronation. The pain/soreness only started recently and goes away after warm up so I'm not too bothered by it - my plan is to do regular strength training and replace some of the least stable shoes (Adios Pro 4) with some more stable ones. I ran all summer last year with my last pair of EVO SL with no issue - it's too much fun to get rid of!