Some of the changes are cool. I'm good with the change to Krass. They kept the overall detail about him/her growing up out in a village near the Vine Jungle that was threatened by Beast Man. (They did mention the helmet belonged to her father, so maybe this is actually intended to be the original Ram-Man's daughter.) Cringer is a much more interesting character in this series than he has been in other adaptations.
I really like the attention to parts of the original mythos that have always been mostly background like Randor and Keldor being half brothers or Evil-Lyn's name being Evelyn.
But there are some changes that are driving me nuts. Teela uses magic. Duncan is just a kid and obviously not Teela's father. No Marlena? Does anyone not know that Adam is He-Man?