I'm starting a new thread because the other thread got overly emotional. Coming from someone with quite a bit of paladin experience in EE.
Holy Sword: +1 Enhancement, +1 Critical Damage Multiplier, +1 Critical Threat Range.
Greatsword: 17-20/x2 (+20%)
can become 15-20/x3 (+60%)
Longbow: 19-20/x3 (+20%)
can become 17-20/x4 (+60%)
Longsword: 17-20/x2 (+20%)
can become 15-20/x3 (+60%)
Scimitar: 15-20/x2 (+30%)
can become 13-20/x3 (+80%)
Shortsword: 17-20/x2 (+20%)
can become 15-20/x3 (+60%)
Heavy Mace: 19-20/x2 (+10%)
can become 17-20/x3 (+40%)
Balizarde: 15-20/x3 (+60%)
can become 13-20/x4 (+120%)
160/120 = 1.33
180/130 = 1.38
140/110 = 1.27
220/160 = 1.38
As you can see, from this assortment of favored weapons, that holy sword can add between 27-38% extra dps. Thus far, indisputable.
#1 ---- 27-38% is far too high for a class feature.
#2 ---- 27-38% is far too variable as it completely eliminates many options, relegated into the dustbin of non-viable.
#3 ---- The debate over holy sword is actually a debate over Paladin viability due to its enhancements being terrible.
#4 ---- The devs don't play EE tanks.
We would not need holy sword if the enhancements were any good. This does not address the vast power differences between different favored weapons. Thus, the best solution requires a enhancement buff, feat buff, and holy sword nerf. This can be done perfectly with only a few changes.
NOTE: I am suggesting all 3 proposals as a combo to be used simultaneously rather than separately.
Proposal 1 - Nerf Holy Sword
Holy Sword - Grant +1 Critical Damage Multiplier
Proposal 2 - Buff Favored Weapon Feats
Beloved of the Lord of Blades ---- Increase the damage of glancing blow attacks by 10% with Great Swords.
Beloved of Silver Flame ---------- You gain 10% double shot with Long Bows.
Beloved of Sovereign Host ------- You gain BAB equal to your character level and +5 damage with Long swords.
Beloved of the Undying Court --- You gain 10% double strike with Scimitars.
Beloved of Volkoor --------------- You gain a +1 critical damage multiplier on rolls of 19-20 with Short Swords.
Beloved of Amaunator ----------- You gain a +10 enchantment bonus to your main weapon when it is a Heavy Maces.
Oops, this accidentally buffs the dead cleric class as well. Totally unintended. And also makes unusable weapons such as the heavy mace usable again.
Proposal 3 - Buff Defender Enhancements
Holy Bastion -------------- You gain 1 Hit Point and 1 Positive Spell Power per action point you spend in this tree. Each Sacred Defender core abilities grants +2 double strike.
Stalwart Toughness ------- You gain 1 Hit Point for each action point you spend in this tree. Each Stalwart Defender core abilities grant +2 damage.
Inciting Defense ----------- When in Sacred/Stalwart Defense, you gain +[10/20/30] Fortification and [10/20/30]% bonus to melee threat generation. *
Divine Righteousness ----- You gain temporary hit points equal to twice your charisma score and +100% bonus to melee threat generation. *
If someone is actually doing 300% as much dps as you such that you need 200% threat bonus, you shouldn't be in the raid.
Oops, this accidentally buffs the dead fighter class as well. Totally unintended.
Conclusion
By adopting the proposals I have outlined, we have killed 4 bird with 1 stone.
1) Nerfing Holy Sword
2) Readjusting the DPS gained across multiple levels and enhancements
3) Buffed dead cleric class and dead weapon types
4) Nerfed the abusive 11-20/x4 balizarde and 15-20/x5 heavy pick and 11-20/x4 ESOS builds.
You will not find a better solution than this.