It was pretty natural for me to compare this "Koeharu!", on the one hand, with "Dasada" (both dramas have a cast consisting, mostly, of Hinatazaka46 members), and on the other hand, with "Koe Girl" (both dramas tell the story of a girl who wants to become a voice actress).
In regards to the former, although both dramas convey nice, uplifting messages (and that alone earns them an extra point as far as I'm concerned!), "Dasada" was imho the better written one; it had a light but not shallow approach and the comedy parts were at times hilarious, whereas in "Koeharu!" the comic relief is more often than not ridiculous rather than funny, and there are some more serious, realistic, borderline gloomy moments (not a problem per se, of course! But the two aspects combined felt a bit confusing, honestly >__<).
The acting, though (and this, despite the less convincing script!), is imho definetely better in "Koeharu!", proof that the girls have indeed honed their skills meanwhile, kudos to them! ^___-
The "problem" - and the reason why I can only give this a "7", despite being a full-fledged "ohisama" (= Hinatazaka's fan ^_^) by now - is that "Koeharu!" loses quite badly when compared to "Koe Girl", particularly script-wise.