Outdated Raids

[BillyKaplan]

you don't need to rewrite all the code from zero if you want to add identical, copypasted feature to something, you copy a part of core code and alter it as needed. Rather, you'll be fired for rewriting all the code because you'll not meet deadlines.

Twelve preserve, no! I literally quit a place because the project I was assigned had a bug that existed in half a dozen locations that were effectively the same bits of code which I had to slave to find. How's that for time consuming? Copy-pasting code is not what they mean when they say code should be reusable.

For example, Mentor Roulette already has all 6 raids in it. For Raids roulette you take that ready, tested, working code and delete all entries which are not these 6 raids. Raid Roulette code ready.

Not precisely. Mentor roulette has different ilvl and level restrictions. It's a solo duty. Already if you copy-paste the code as you said, you'd have to make modification.
Hopefully the code used for the roulettes is sitting in a nice little function that receives all these things as parameters (# of people who can queue, party make-up, ilvl, duties in it, etc) and is easily accessible from all places relevant to this discussion. But that doesn't mean it won't have to be tested still.