I think the tune and progressions arranging and wordsmithing are pro-level.
The samples you have are really good.
The vocal performances are awesome. The sentiment, uplifting. At this stage, almost radio-ready. But there's some harsh 'essing' in the vox at around the 8K band. Really noticable at loud levels....which the work begs to be listened at.
I downloaded the tune to play it on WMP. I cut the 8K band -6 to -9...and that got the vox essing under control. Maybe step on that freq in the mix [vox's only] before the next master, so y' don't kill the gloss in the instruments, too? If I can hear the harsh essing, it's bad. Ive got poor HF hearing.
I also intend on keeping this tune [You Say] handy on my desktop. You don't say it's a cover. If it's yours, or the whole group's, standing "O".
I gave you 5 stars.
One other thing, arrangement-wise, could be an improvement, I think:
The organ. It's playing the sustaining triads that the voices are singing. It really is unnecessary, and old-school. [ I might substitute the organ with a classical guitar playing inner, leading dissonant voices that the piano and vocals don't use...] Which brings up this point:
The vocals and support are all triads and dom7ths. There's a great opportunity to add a little tension/release dissonant voice-leading in the chords...or an added fourth voice, instead, to do the job. Just a smidge of it to elevate the progressions from 'safety' at poignant moments.
If you don't know what I mean, listen to 'Take Six'...masters of the craft. If you can't grab it technically, you and the group will surely grab it organically, with some intense listening to those guys.
I can't believe nobody commented on the tune or mix. This is art. And the amount of voodoo needed to bring it up to absolute pro standards is small...and would only push it up a little...it's already way, way up there.
Gifted voices and instincts, all around. Under the guidance a producer who knows orchestration, and a gifted engineer, y'all'd break the sound barrier.
That is NOT to say that you are not a good engineer: the recording has lots of life and reality in it. Very clean, big, and present. High five-ah! I like this tune as much as Rice's "Untitled Hymn".