weuh Is there still a reason to isolate Google Play services if you just have 3-4 non-anonymous apps installed through it? Google Play would only be able to interact with the few apps I download off of it right?
It depends on the apps. Where they were installed from doesn't necessarily matter. An apk from github can still contain Google libraries and use Play Services.
You will have to consider how much you trust your apps, how important it is to keep your identity & activities separated, and if the inconvenience of separate profiles is justified. Only you can make that decision.