I don't think that Kyo-Ani will slack off. They have to keep up the good work because they are also a brand name, just like Madhouse, Gonzo and Studio Ghibli. Any blemishes potentially decreases the selling ability of their name.
Putting some seiyuus that they work well with and are popular on the cast isn't a problem to me either as long as they can do the job properly. They have to maximally sell this show. Same thing happens in R1. It's a business too after all.
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