There is definitely an appeal to the personal touch the community can give. Though I obviously cannot vouch for the quality of the localizations we’ve had for Frontier as I do not speak all those languages, just based on the questions they ask throughout the process they do seem to care about context and tone. So there is that.
We would not retranslate anything that was already translated by the community, unless we have to change an old line of text significantly enough to warrant it.
For Grim Dawn, the community stepping up was the difference between the game’s text being available in other languages and it being exclusively in English. We were in a very different situation back then. There were more community volunteers translating the game than there were people in the entire company. 
I’m not sure it’s fair to expect or even hope for such a commitment from the community in the future. V1.2.0.0 is going to need stuff translated, so hoping all the community volunteers pop back in might be a bit of a gamble, haha.