I definitely have made the suggestion to add Variant Human and make Wyll and Gale Variant Humans instead of the baseline. Due to the way attributes scale, having +2/+1 to specific stats is going to be much more useful than +1/all except for specific builds.
Elemental Adept is I guess an okay feat for Wyll, although Alert would also be nice (but that might be complicated given the known tricky issues with surprise rounds). Survival proficiency is fine.
I don't think changing Gale's WIS score from 14 to 10 is the best idea. Gale should by default be a caster in the backline, so the higher DEX isn't likely to do a whole lot - especially the farther you go when enemies have higher and higher +to hit bonuses, and there are a lot of dangerous spells with wisdom saves. Losing 2 from wisdom saves could be really bad. Spell Sniper is a good feat for Gale, although I would personally suggest Chill Touch instead of Eldritch Blast. Religion proficiency is fine.
