TCG is correct. You're gonna be getting that same rushed feeling throughout the first 13 or so eps. because they're speeding through the first season of the first FMA so they can get to the "truer faithful manga-adapted episodes".
As for the dub, it's either one of three things:
1. Because we're feeling rushed through the first batch of episodes, it might be affecting our sense of...appreciation? of the dub even after they did a good job.
2. The VA's were being rushed to get these first batch ready for tv so they didn't to a good job at all. The newere stuff will be different.
...or...
3. It's another example of what I like to call "Funi's dub-by-numbers" approach that they've been using a lot recently. So what u hear now is what u'll be getting throughout the series.
And that's my two centabos.