Ok, so my opinions are:
-Murfy was partly created to have the Gamepad player feel they have presence.
LOL forever alone.
-You can travel to any of the five worlds from the start.
Sweet! so you are not forced to taste the same environment again and again.
-Comedy plays a part in the game like the first. Ex: in the aforementioned level, an unwitting monster janitor is oblivious to his demise.
Hope they have more cutscenes than Origins did. Like... 4 or 5 comedic cutscenes would make this game historic.
-Each world highlights a gameplay mechanic.
This could be good, if it's correctly done
-Each world also has an unlockable character. Barbara is the character from the medieval world
I supposed this would happen, however I would like to see some retro characters, I wouldn't like to play as Caesar, no more humans please.
-There is a Shaolin style training area to practice and take up basic tutorials as well as advanced challenges.
You don't know how awesome I feel about this. First of all, it's a god damn
Shaolin training area, that makes it insta-awesome. Also, knowing that this area has the "basic tutorials" makes clear that we'll get all of the abilities from Origins from the beginning, yay! no more scattered powers

and finally, advanced challenges, makes me think that this area would work as a replacement to the tricky treasure levels.
-Levels with licensed music will be remixed with a Rayman flavor.
By Rayman flavor I assume they're talking about kazoos, singing lums, jew harps and gibberish.
-Eye of the Tiger now has a flamenco feel with gibberish lyrics and a kazoo.
-There is a Hawaii luau version of Woo Hoo by 5, 6, 7, 8.
Sweet semen of baby jesus...
-They wanted to improve the basics from Origins. Origins was all action speed, and intense moments, while Legends has times when you can pause and explore.
I know someone who was complaining a lot about that
-There are little to no "breaks" in levels to make levels feel like a continuous experience. In Origins, every level had about 4-5 pages that were like individual rooms. --Now levels vary more in their size.
No more Darkdoors? thank god.
-There are no mosquito levels because the developers think there's enough variety with Murfy.
Nailed it.