Sorry that I haven't done this sooner.
I did t2 and t3 legion of almire solo and in groups. I'll start with t2.
T2 Legion of Almire
I found it easier than a danger room but harder than Romulus Twins and Royal Jelly Palace. I think the t2 Legion of Almire will be a hit with that group. I just hope the payout will make it worth it when it's released in game. I like the levels and the basically harder graveyard missions. It will also be a good way for t2 people to practice with zombies before going into fsc. They don't really get much practice with zombies before fsc.
T3 Legion of Almire
My personal opinion on the difficulty level would be that it's harder than FSC but not as hard as a Shadow Lair. I would say my expectations on danger missions was that they would be extremely difficult. I don't find them extremely difficult. I do find them difficult enough that it would satisfy the average spiral knights player. I think the levels are good, and really neat and different looking. I actually enjoyed it and I think it will be well received in the community for the most part.
The new suicide bomber zombies are awesome. lol. Absolutely annoying, but it's good. I wish there was a way to make them more difficult because Really if you just have a good shadow shield and dodge a bit they aren't hard... just annoying. Maybe making them swing at you or something.
If we are looking to up the difficulty scale I would say put the phantoms in there. It is a graveyard... so why not have any phantoms? I think that could make it more sporadic and interesting.