rhimbo Just a quick question. Where is "...the exact place ... to manage ... apps.”
For me, I manage apps (disable, restrict battery, background data etc) with the first of your list:
rhimbo Is it the "Settings -> Apps -> All Apps” menu?
I have a home screen widget for that: widget > settings > App info
which is a shortcut to the "Settings -> Apps -> All Apps” menu you mention.
You have the benefit there of the drop down filter for all|installed|disabled and the search and show system options too.
I'm sure you know all this already, but if it answers your question, I can say that's how I manage apps.