My understanding was that the church fathers believed that the latin should be not as complicated as the classical, or more ancient, latin. A simpler latin was preferred because the scriptures themselves were “simple”. The claim that the medieval fathers weren’t very good with latin was all based in a misplaced educated snobbery of those who accused them, frankly.
At least, that was what I learned about it. Others may know more.
True. Snobbery about Church Latin arose in the Renaissance with Erasmus and the other Humanists. If you didn’t write Ciceronian prose, they considered you to be barbaric.
Ironically, that was the beginning of the end of Latin as a LIVING LANGUAGE, as soon as it began to be treated as a fossilized language that had died 1400 years earlier.
Jerome was actually chairman of the translation committee. I find the text to be fairly poetic, or rhythmic anyway, while being easy reading.