Just wanted to explain our situation, see if anyone else is having the same problems and if anyone has a solution!
We are a large Primary school and have just switched from Windows 10 to a mixture of Chromebooks and Laptops running CloudReady. We also have the Wonde logins set up which works really well. However, when the Chromebooks started being used in classes last week we started having problems with really slow logins (something that I didn't think would be a problem with Chromebooks). After further investigation, it appears that the Play Store and Extensions are installed per user. If a class of 25 are logging on to Chromebooks at the same time then there is a bottleneck at our APs and it also uses up all our bandwidth on our leased line. I have therefore temporarily disabled the Play Store and larger extensions (more than a few mb). Disabling these things now means that logging on is fine again.
However, this does cause a problem. One of the attractions of using Chromebooks is the ability to use Android Apps. This would be great if the Play Store, Android Apps and extensions were downloaded once and stored on the device. However, they are downloaded per user so every time a user logs in to any Chromebook it has to pull down all of those things which then clogs up our network. We have decent Switches and APs (not ac) and 100MB Leased Line. I'm guessing there are no easy solutions to this but any advice is appreciated!