You heard it here first folks, the lack of glitches involving terrain translates to PvE encounter nerfs!
https://classic.warcraftlogs.com/reports/4tMAG2bTaf3JcpLW#fight=30&type=damage-taken&source=29&ability=13880
3 stacks on this guy
https://classic.warcraftlogs.com/reports/2MAn4fVFRDPaNQ7q#fight=68&type=damage-taken&source=172&ability=13880
4 stacks on this guy
Seriously, just look at any log. The application has two dice rolls. First roll is every time you attack Golemagg you have a chance to proc the debuff. The second dice roll is to check whether or not you resist the application of the debuff. Nothing has changed.
This, a thousand times this.