Switch a plugin from 'anyone' to 'pro only' status


I am running a WP multisite network and would like to activate the Pro Site plugin in the near future.

Do you have kind of a procedure for introducing the pro site plugin on a already running WP network ?

As far as plugins are concerned, for instance, I have made some tests with the following results.

If a subsite is using one plugin, and that I switch on pro site dashboard the plugin from 'anyone can use' to 'pro site only', then the plugin is still activated on the subsite and still listed in his dashboard plugin list.

The only change is that the subsite admin cannot any longer deactivate the plugin because the checkbox on his dashboard plugin list has been replaced by the red string 'pro site only'.

Is it a normal behaviour or am I making something wrong ?