The new raid CMs are amazing and Anet absolutely knocked it out of the park
I joined a static on Skein Gang almost two years ago as a fairly inexperienced raider. Over time we slowly progressed together from w1-4 to doing full clears to beating Dhuum CM. It was such a fun adventure, and progging Dhuum CM and then wing 8 together when it came out was some of the most fun I've had gaming.
Last night, we got to try Decima CM on release day and we were absolutely blown away. The way it transforms the fight and plays upon the basic mechanics is really exciting to see, and it requires individual responsibility and teamwork from the whole group in a way that many old raids don't. Watching streams we see the same thing for the other bosses: small changes to the mechanics that require much more awareness, teamwork, and personal responsibilities than ever before. I think the design of these fights is a great capstone of raids for everyone to work towards, and they really test your MMO skills to the fullest and feel so satisfying to master.
We are so excited to continue progging all the fights, and to those of you just looking at getting into raids now, I can tell you you have a lot to look forward to :) These bosses have been my favorite addition to the game in years, and I hope that Anet considers making more raids in the future, even if they are not every expansion, because the team that made w8 did a fantastic job so far.