Let’s see:
- The unreliable nature of corruptions: bad
- The annoying random slow: bad
- The annoying random eye: bad
- Any other negative corruption effect: bad
- Being forced to use corruptions because it’s easily 20 to 30% of your damage output: bad
- Being forced to play horrific visions because otherwise you can’t be on par with the rest in terms of dmg output: bad
- Twilight Devestation looks cool: good
Conclusion: corruption is utterly terrible. Bad design, never want to see it again. It ruins the fun in WoW, especially because it’s hard to obtain and hard to try something new.