If you had read the entire thread RL, you would have seen that we have been discussing that it is a combination of factors. Not just the Hypnosis accuracy, although that has played a part, whether it should do or not. It may just be 10%, but there is also a mentality to it. 60% is way too near 50% for my liking, whether that is rational or not. 70% was a lot more comfortable, I'm thinking that 1 time in 10 I would miss twice in a row, as compared to roughly 1 time in 6 now, that is actually quite a large change.
There are a lot of Gengar sets that still work in the current metagame (most involving Substitute), it's niche has simply changed a little. I have used it a couple of times, but more as Blissey and Scizor bait, as compared to anything else. Many of the sets (especially the Sub set) may have carried Hypnosis previously, but it is now a little too unreliable (the chance of it missing twice has practically doubled!) and people are resorting to stranger and more specific moves such as HP Fire. Personally I would rather be sleeping Scizor, as I can use the sleep status to screw over so many more things than simply Scizor, but I can't really risk it missing with Bullet Punch flying around. There is an example of this culmination of factors.
I do not accept your argument for Milotic at all. How have people suddenly "realised that other bulky waters are better." One can only really argue that the "ignorance of the people" remains mainly constant. There has been no reason for people to "suddenly wake up." The same stands for your argument with Crobat, people have not suddenly realised that Crobat is bad. I believe you may have a point over the long term, although I'm fairly sure by July of last year we still had a very good clue of what was good in OU, and what was not. It is not like we are making comparisons with early DP here.
EDIT: And yes, I really would consider dropping Draco Metoer if it dropped to 80%, that is worse than moves such as Fire Blast, who I find unreliable at the best of times.
EDIT 2: In no way are we saying here that this is 100% objective. To be honest I feel "less inclined" to use Hypnosis, but I don't feel that I should never use it. If it has the sort of effect on a number of people, you will find the number of Pokemon using Hypnosis decreases, but it obviously won't go away entirely, because no one thinks:
RaikouLover said:
"Omg hypnosis sucks now and we can't use Gengar and Yanmega"