A little sad about not having any Klan Kultures for my Orks yet. We got little boosts in +1 Speed and +1 Save on Boyz, but we've lost free charge re-roll, 2nd turn of the Waaagh!, and other things.
What I have been interested in is seeing how a brick house of 3 units of Meganobz with a Big Mek in Mega Armor shapes up. T6, 2+ Save, 4+ Inv with the Mek's Kustom Force Field, 1 Meganob revives per turn. The loss of Kombi-Skorchas -might- be ok with having such a durable unit on the field.
This is the exact same thing they've done for the past couple editions, so Legends as a thing isn't new. I see this more as, hey, these models are old as hell, aren't made anymore and we don't want to spend time making sure they're balanced for tournament play, so here's rules for you to play them in casual/Crusade games, have fun.