Pin management in Altium Designer
Firstly: There's also reasons to make value specific parts, one being absolute certainty every detail, including supply line is defined by your library for all projects. 

Secondly: Never. EVER! change part specifics in a schematic that aren't also reflected by the library.
What happens if someone decides to change the naming of your component? He/she then updates all schematics from the library and suddenly every thing about your schematic is broken. Cannot be allowed to happen!

This then implies that you should really make neat representations for the exact parts you are using. The first few times may take you 30 minutes, but once you know all the hot-keys or button locations, it's a 3 minute job to draw a component or footprint, or to make proper links and variants, if you know what you're doing. Especially if the footprint is supported by the IPC Wizard.

For mundane things like standard SOT/SOP/TQFP/BGA/etc it takes me much less than three minutes if the datasheet uses IPC compliant naming in the size table.

Whether or not you use integrated libraries (I don't - I have a versioned bunch of Sch/Pcb Libs that can be joined into projects), you should make serious choices if you intend to use the program professionally and not just slack off and copy-paste till you drop. That's a great way to make crappy shit at a high rate with zero gems in between.

You either learn how to use the program properly, or you tell whomever is paying you for it that you're not up to the job.