Dr. Awkward said:
I'm not sure what you mean by "pry."
Let's say, for the sake of argument, that there was no flavour at all associated with the warlock. None. Just a bunch of mechanics. You add your own flavour. You suggest that you'll enjoy "detailing the cool flavor." You just fill in the appropriate names, effects, etc.
Now, what exactly would change if the warlock came fully loaded with flavour? You'd still detail the cool flavour, fill in the appropriate names, effects, etc. The only difference is that you'd be overwriting what's there instead of filling in blanks. But overwriting existing flavour is exactly as easy as filling in blanks. It's not like the existing flavour is going to fight with you. You just tap the "insert" key, write "celestial" over top of "infernal", and it's done. Cross out "sends him to hell" and write in "sends him to heaven". Since you're going to be doing all this detailing of cool flavour anyway, I don't see where you get the idea that there's going to be a bunch of extra work.