One other thing you might want to check is the wireless health report.  You can see from that report not only the failed connections but also the latency per AP.  That may show you where you are having wireless problems.   FYI, we have sites that routinely exceed the "suggested" number of clients with no issues.  It comes down to what type of traffic you are passing and the number of services you are running.  If it's simple internet traffic and your utilization isn't too high, then you should be ok on the MX.   One other thought on the Meraki reporting.  Keep in mind the longer your timespan, the more of a trending view you get.  When Meraki shows that report, they are not giving you an exact view of traffic.  They actually sample the data and show a summary.  So you may actually miss some peaks and valleys.  Once you understand that, then you can understand that the traffic reports give you a good "trend" but not exact data. ... View more