Snipers are not needed for combined arms, they ruin it infact, when they hardcounter both infantry and support weapons.
But it doesn't reward troop composition, all you need is infantry with snares and you're good to go.
Everything else gets hardcountered by the sniper.
In a game about veterancy, unit retention, RNG, positioning, flanking and cover, a unit that ignores it all (snipers) is broken.
Consider this in context with the changes I proposed which reduce sniper lethality.