Its not the slow-burn, but how he continually asks the science people to ask if he could do the feats he could do. I get it, Wells wants to keep him safe for scary future reasons, but the character from the comics and other mediums would just go fuck all out trying the impossible to save the day and didn't need shoulder angels to tell him whether to do or not do crazy impossible speed feats. Its a not a major gripe as I still love the show, but its not a minor gripe either, kind-of a medium gripe.