Those germs seem like the principal obstacle in the way of Blizzard placing C'Thun into classic gold wow in his first form. But here is my pitch: Leave 'em in.
Yeah, it is going to be bothersome if your lead dps gets bodied unfairly, but this is Classic. The game's already an unbalanced relic, and also the folks knee deep at the gorgeous mess are all thirsting for a drop of the old frustration. I refuse to believe a community who enjoys grinding farming and honor Scarlet Monastery will be put off with two or three bug-induced raid wipes.
For one more perspective on C'Thun I wished to talk to a regular raiding guild, one which came to AQ40 prepared but to a much lesser extent than those I previously talked to. Merrilia is an officer in Dopamin. Even this guild, the sort of guild you might find on any server filled with regular gamers, would be eager to try a pre-nerf C'Thun run, albeit with some of those pesky bugs removed. "Pre-nerf C'Thun would be fun to try out," Merrilia said. "That being said it depends how many'bugs' are included in the nerf variant and when these bugs were overly match breaking to allow for a kill at all."
In the end, that the pre-nerf C'Thun encounter is as much a part of Classic WoW as farming devilsaur leather, or fending off rogues in world PvP. It's a part of the legend of the game, something never bested by gamers at the time. Every person I have asked said they would be interested in taking on the challenge, from the mega raiders, to buy wow classic gold a average joe.