First I want to say this is not a 10 vs 25 thread.
I know during the holidays other guilds will have this issue as well, a lot of people away.
Last night when we were doing HC Imperator, we only had 11 people.
We felt that the fight was extremely more difficult with 11 people then the normal 23 we have.
One example that we noticed was each of the small adds in intermission were hitting the tank for 25k magical damage. With with 23 people they hit the tank for 26k.
I don't think they should be hitting for 1k less with 12 less people. They should be hitting for a lot less.
There were number of other issues we discovered that were not scaling correctly. I will have to look at logs when I get home.
Anyone else noticing when they are doing 10-12 man in HC that it is significantly harder then when you have over 20?
Before some people say we'll get more people. Go try the fight with 10-12 people and you see that the scaling is not corect.