I didn't think the voice acting was bad, however Chiwetel ejiofor is an actor I like, but he is no where near as menacing as Jeremy Irons was as Scar. Also "Be Prepared" was reworked into something shorter, and that was my favorite song, so that was a negative for me.
Timon and Pumba were the only things really changed, insofar as they were basically the same, only updated a little bit for 2019 (since their humor was a little more pop culture-y than the rest of the movie). They were also the best part of the movie.
The Animation is incredible, the movie is a technical marvel, the acting is fine, the score is obviously great, the songs are fine. Basically everything about this movie works except for answering the question of "Why does this exist?".
No risks were taken, no changes made. But it sold a fuck load of tickets, I decided I was bored and would see this saturday and the only time I could get a decent seat in the Dolby was 9:30pm, every show was sold out, except the trash seats.