Okay I've restarted my game and properly setup this mod, it's actually insane how much more difficult the fights become, there's a bunch of other mods to install, mostly things that change it to 1:1 5e rules.
If you're going to install this read the page first and the article attached to the mod.
You need things like 5e Spells, Expansion and a few other mods, but honestly its a lot of fun, kinda aggravating but in a good way. Also I've adjusted the level curve of the Expansion mod so I gain levels a bit quicker, I literally just divided the xp required for each level by 2 all the way up to 20.

When you have it set up with the other mods as well that are in the article (the equipment mod), it really just makes it feel a lot fresher, definitely difficult but not too difficult. I was thinking there was a bug which made it so my ranged attacks had to go to melee range but it was just because the mobs kept color spraying my party to hell. I really do recommend this if you've played through like ten times already. Kinda makes you see how dumbed down the combat was prior.