This is very good addition to the game! I've even made up new class of soldiers - sniper (who has enough strength and decent accuracy). In all missions I always have 2 snipers, they are distinct from other soldier classes, as sniper rifle is more accurate than most weapons, but require many TUs to shoot. I use heavier version and I think it has pretty well balanced stats.
Recommend this mod to everyone!
Now we need some kind of advanced-with-alien-technology version of sniper rifle, to use in later game!