Was hoping for some help from the geekzone community from anyone experienced in Meraki AP's, i've exhausted all options trying to figure out a problem we are having with this product, I recently took over managing an environment, we have 17 sites across the country, A combination of 200+ MR42/52 Meraki AP's  that are all experiencing same very weird problems. 

When I first came onboard the wireless profiles on them were horrible, basically max settings of 80/40, max power and auto/auto the wireless experience was horrible, I could see throughout the log history someone had been fiddling with them for quite some time to try and make them "work" settling on max everything as their solution.

They are now adjusted to this

The experience is much better but I am still having this weird problem where progressively over a period of two weeks the performance will degrade drastically to an unusable state, rebooting them will fix the problem again for two-ish weeks then rinse and repeat.. theres no way to schedule reboots or do bulk reboots and is a very tedious task to through rebooting 200+ aps weekly to prevent the problems from cropping up.

They don't happen consistently all at the same time, but will start gradually getting reports for different sites over time, it's to the point where they will say "the problems back again" check the meraki portal and yep I can see high latency and utilisation across multiple AP's

I have had wireless surveys done to rule out interference or coverage issues, added additional AP's in high density areas to help spread loads, engaged with wireless consultants, they have acknowledged theres a problem but don't know exactly what it is, engaged with Meraki support for months who refused to acknowledge there was anything wrong.. I recently had one meraki tech acknowledge there was an undocumented problem with our models and the current version of firmware, I thought GREAT!! finally have found the problem! targeted a site, rolled back the firmware to the last stable version, however it didn't fix the problem, in fact the performance degraded faster than normal. 

Coming from managing solutions like Aerohive, Aruba, Rukus I really don't rate Meraki and given the option I would swap it out in a heartbeat but we are to heavily invested in it to just rip it all out and start again so need to just try solider through getting them to work consistently. 

Some things to note, when the performance starts degrading I can see very high latency(2000+ms) and higher than normal utilisation 60-80% when normally 10-20% but after a reboot the same clients will reconnect and all back to normal.

I'm in the process of having the devices interrogated for wireless nic driver version and updated to latest versions but if it was client side I would have thought the experience to always be poor instead of it getting worse over time then getting better after the AP's are rebooted?

I've seen others on reddit/meraki community forums posting about similar issues but their frustrations go into a blackhole with zero acknowledgement from Meraki community staff.

Meraki settings are very vanilla and I'm truly lost at what I can look into next. 

Any help or idea will be appreciated.

Cheers!