I myself am more upset about the fact that the dub insists on giving Team Rocket horrid dialogue and as of the first episode of the "episode N" arc it has returned GROOOAAAN!
To add to that, I dislike their intros greatly, with only a few exceptions (9, 12, and 16).
The insert songs they do are pretty decent, but the dub BGM is really flat in my eyes. That could use some work as well if they want to replace the OG JPN music (or better yet, don't replace it).
The Pokémon voices like Heatmor, Volcarona, and Beheeyem could use some work, too.
I wish we actually had the scenes from the Japanese openings while keeping the songs in English. Seriously, I don't know what's with TPCi. Many horrible voices(Iris's, Jessie's, Unfezant's, Leavanny's), skipping the endings because they need ads, etc.
I hope they'll show at least the scene from my signature in the english Da! opening.
For me, the horrible voices remaining on the show now are now Delia, Meowth, and Professor Oak. These three STILL need some serious work, IMO.
Liked all the 4Kids voices for the older main chars more, but sadly they refuse to budge on that issue, so that's a pipe dream.