All ensembles need work on taking bigger breaths.
Most of the time when an ensemble says they can’t make it to the end of the phrase, I suspect that they simply haven’t budgeted their breath effectively – either by not taking a full enough breath ahead of time or by using air inefficiently when they sing.
Better technique will solve the second problem over time, but the first needs just anticipation. In the context of a specific phrase, it’s a question of knowing where and how to breathe and using that knowledge.
In the context of entire pieces, I think that choirs overwhelmingly do not sufficiently fill their lungs before pieces start. Today I attempted to prove that point in rehearsal by taking a 10-second deep breath and then talking for a solid 45 seconds before taking another breath. Start a piece with that breath, and each subsequent breath just replaces the air used, rather than starting from scratch.
Learn to anticipate properly before a piece even starts, and you’ll never again complain about a phrase length to sing without breathing.