Just watched the Eng dub yesterday, so here's a review (anything I didn't like is something I obviously would want to be changed):
First of, Rufus' delivery was just painful to listen to. Very lackluster, uninvolving delivery. They added so much needless dialogue between him and Cloud, and what he could've done is at least shown some effort delivering those lines, instead of plainly reading the damn paper. Won't even bother going to examples, because all of it goes.
Denzel's new voice actor was plain bad, which probably has something to do with me really liking the kid who voiced him in AC. Didn't live up to the standard set by his predecessor; he totally butchered every line, and the new ones where even worse - "whatever... like it matters anymore..." that was pretty much the last draw for me. The flashbacks were ok tho.
Marlene's replacement did very well, it was interesting to a see a totally different take on her convo with Cloud and Vincent, tho I must say that I liked her whinny, brat-ish predecessor’s voice more (ex. like "No! Cloud's not here yet" and "No! I don't!" were better in AC than ACC imo) Still, she deserves praise for her new scene with Cloud, which was great.
Rachel Lee Cook is a very different take on Tifa than her Japanese counterpart, and I must say I like the former better even though a lot of you complain. Yeah, the "Dilly Dally" was awkward and should have been dropped, but at least, she took the effort of matching her voice with Tifa's facial expressions. The Japanese voice actor voicing Tifa was so detached it was irritating. The bedroom scene; you can clearly see she is hurt and sad, yet the Japanese girl delivers her lines like Tifa's scolding Cloud for not cleaning his room and shit. Or, when they are in the Church, and Tifa sees Cloud's stuff on the floor, you can tell that made her sad, yet the delivery is so plain that you're confused. Cook defo had her problems, often times unconvincing delivery, yet at least you could feel some emotion, that's why she wins in my book.
Burton does a great Cloud, a prefer him to his Japanese counterpart any day. The new scene with Marline was where he truly shined, perfect delivery, very involving... tho, his last line "No, this is where A HE-RO began his journey", was awful, and totally ruins the impression. Way to make an encore, still like him tho.
Seffiros is great, I never complain about Newman voicing him, because he just adds something that really works for Seph.
Reno is among the best and his new scene with Rude was great, yet the way they changed their dialogue when they talk to Yazoo/Loz near the Meteor monument, was awful; they should have kept the "Why, the peons aren't trusted?", which is a somewhat confusing line, but eventually works.
Kadaj's extra dialogue was pretty good I thought, and well delivered, but the voice actor needs to cut down on the whining, because at a certain point it gets very annoying.
Zack... Zack is my favorite character and my favorite voice actor. There is just so much charisma there I can't help it... and I do hold a bit of a bias, granted. Crisis Core was a fine experience, mostly due to Zack, so the new scenes were very nostalgic and his new lines were very well delived.
Pretty much it, tho the support dialogue of random people and kids was a bit bad, unnecessary and overall intrusive at places as well. Just my few cents. Watching the English dub made me not like the movie, even tho I was blown-away by it when watching it in Japanese, lesson? Eye candy is still eye candy, tho it could‘ve been good of sure.