It kinda pisses me off that DnD is STILL the best ruleset for tactical RPGs, but it is. It's not even good in various ways:
1. Gygax or whoever designed the ruleset had a very limited understanding of historical medieval weapons/fighting.
Strength should NOT be the determining stat for melee combat, actual weapons are always fairly light, and any reasonably athletic man should be able to wield them without any issue. If anything, endurance fibers are more improtant in forearms and shoulders, for holding or swinging the weapons a lot, not strength. Power is generated by technique, movement, leverage, etc, never strength.
Conversely, strength SHOULD be the main stat for bows (especially the larger kind like longbows), and not dexterity, as it takes a tremendous amount of strength to pull a string back on a bow with lots of resistance. Longbows are something like 90-160 pounds of resistance, so imagine pulling 160 pounds with one arm/side of the back. Most historical longbowmen had deformed backs from this, we can see it in their skeletons.
Longswords are pretty much the same as bastard swords, just a different term, both were large swords hung at the hip and used with two hands, but could also be used with one hand if needed. Primarily, they were 2-handed though, unlike how it is in DnD.
Greatswords should not even be a thing for adventurers. They were massive battlefield weapons in Renaissance and later, specialized for battle roles, you would not want to haul those around with you while adventuring, and they would not work in dungeons/houses at all. Imagine trying to swing a 6 foot long sword around in a tight space.
2. CC, increased attacks per round, and late game spells are way too powerful.
It's just too easy to disable stuff to the point where it becomes trivial, and of course Time Stop, Wail of Banshee, etc, enough said. Also, once your martial classes get like 4 attacks per round, combat is just stupid.
But again, with all that said, it's by far better than all the other crap we've seen so far: Dragon Ass Origins, Ass Effect, Dimwinity: Original Dolt, Poopers of Eternity, etc.