as an old friend from Sweden used to say - if it is not broke then don't fix it; and if you can't fix it then don't break it!
if have serious issues - try a new install.
( i used appack and removed a couple of things/apps and added the things that i needed.
once i got stuff working; i never messed with stuff. 2 1/4 years totally bodhi linux and no real issues and extremely stable. no mac for a baclkup either all of this time. i run 2 thinkpad x series and wife runs a dell inspiron?
if you really do not know what you are doing don't start deleting stuff that you have no clue what they do. YOU WILL BREAK IT!!!!
trust that the stuff that comes with said distro is all needed re: meat and potatoes of the system. you breaky - you screwy.
i need it to work. this is not a hobby - with down laptops i am messed up big time. i use them everyday!
i do not always understand in depth what some of the people here have helped me to tweak or get working - i.e.trackpad - but i listen and try to do what they suggest and they always helped tremendously.
i try to fix or tweak important stuff - i do not worry about background stuff that is not trivial but also not priority to my issues as such.
hope someone reads this stuff - for what it is worth.