As the Title suggest, is the Goal of "No Greatsword to the Knee" to readjust the Damage of Arrows and Bolts, so that their Damage isn't comparable to the Damage of a Greatsword (I'm looking at you, Dragonbone Arrow!). The Author felt, that the Damage of Arrows is unreasonable high, making Archery far too strong. The new Damage is now a Quarter of the original Damage. The only Exception are Riekling Spears, which are untouched. Their Damage remained at 10, making them the strongest Arrow but that shouldn't be a Problem, since their Quantity is quite limited.

But doesn't that make the Game easier?
Sic et Non. If you're playing an Archer, the Game becomes harder since your Damage will be reduced. If you're not playing an Archer, you will recieve less Damage from hostile Archers and therefore the Game will become easier for you.

This Change makes the Damage of Archery comparable to Melee Damage as can be seen in the following Comparison:

Long Bow + Iron Arrow: 8 Damage instead of 14 (Same as an Iron War Axe)
Imperial Bow + Steel Arrow: 11.5 Damage instead of 19 (1.5 more than a Steel Mace)
Orcish Bow + Arrow: 13 Damage instead of 22 (2 more than an Orcish Mace)
Dwarven Bow + Arrow: 15.5 Damage instead of 26 (3.5 more than a Dwarven Mace)
Elven Bow + Arrow: 17 Damage instead of 29 (3 less than an Elven Greatsword)
Glass Bow + Arrow: 19.5 Damage instead of 33 (1.5 less than a Glass Greatsword)
Ebony Bow + Arrow: 22 Damage instead of 37 (Same as an Ebony Greatsword)
Daedric Bow + Arrow: 25 Damage instead of 43 (2 more than a Daedric Greatsword)
Dragonbone Bow + Arrow: 26.25 Damage instead of 45 (0.25 more than a Dragonbone Battleaxe)

All remaing Arrows and Bolts have been readjusted, too.

Compatibility:

Reliquary of Myth by TitansBane: Patch in the Optional Files. (Bloodcursed Elven Arrows and Arrows used by summoned Dremora)

Ordinator by EnaiSiaion: Patch in the Optional Files (Arrows from Trick Arrows)

aMidianBorn Book of Silence SE - Weapons by CaBaL 120, ported by kryptopyr  : Patch in the Optional Files (Skyforge Arrows)

Skyrim Revamped by Nightman0: Skyrim Revamped increases the Damage of Rusty Arrows to 40 to make the Bossfight against Sigdis Gauldurson harder. NGSTTK reduces their Damage to 1, so the Fight will become much easier.

Song of the Green by Waribiki: Song of the Green Patch by bak3dpotato 

Any other Mod that adds Ammunition/changes Vanilla Ammunition: Requires a Patch. A Guide to create a Patch using SSEEdit is available in the Article Tab. It should be easy enought to follow, so that almost everybody should be able to create their own Patch.

Any Mod that modifies the Projectiles (Range, Speed): No Patch Required

Load the Patches after the Main File and after their associated Mods.