Stop looking for the right answer in the music.
There’s almost never one right answer. It depends on the ensemble size, maturity, rehearsal time, venue acoustics, time of day, and a thousand other factors. The best performances react to all of those factors to come alive in a specific way.
The right tempo? It depends.
The right key? It depends.
The right vowel shape? It depends.
The right fermata length? It depends.
The right weight of the beat? It depends.
It depends, it depends, it depends.
It depends on you to make the judgement calls in 1,000,000 moments to choose what’s right for the situation.