Following his Arsenal exit, it’s easy to poke holes in or praise Edu Gaspar’s work in hindsight, who oversaw a real improvement during his five years at the club. Arsenal are now well-positioned to win serious silverware under Mikel Arteta and Edu has to be given credit. However, Arsenal fans may also be excited for change too, after all, Edu’s work hasn’t yielded proper success just yet, and the Gunners’ summer transfer window now looks worse by the week. Riccardo Calafiori should be a success, but the jury is still out on Mikel Merino and it’s hard to argue against the idea that Raheem Sterl…