So here's my updated list of ideas to differential the specs. Not hoping for much, I pretty much make one of these threads for each expansion since wotlk.
General:
• All specs can use daggers or swords etc.
• Daggers grant +10 energy cap, per dagger, all specs.
• Preparation removed. All affected abilities instead have 2 charges.
• Lethal poison is Assassinations only.
• Slice and Dice is combat only.
• Burst of speed removed. Sprint now has 15 second cooldown
Assassinations
• Only spec with lethal poisons.
• Assassins resolve increases haste by 40%.
• Deadly poison application grants energy and reduces the cool down of Corrosive poison by 1 second.
• New ability: Throw able Poison vial, 10 second cool down, replaces shiv. Applies Deadly + non-lethal poison to all enemies in the area. Doesn’t break stealth. Also applies magnified shiv effect to affect enemies.
• New Vendetta replacement. Corrosive poison: For the next 15 seconds, each time you apply deadly poison, you also apply corrosive poison and gain 1 combo point. Corrosive poison weakens the target, increasing you deal to the target by 30% and making them visible to you even through concealments such as stealth and invisibility. Cannot be dispelled, lasts for 20 seconds. 120 second cool down.
Combat
• Sinister strike + Revealing strike damage scales up when daggers are used.
• Remove insights/bandits guile crap.
• Redesign slice and dice, now a 2% stacking haste buff, stacking 25 times. Swapping weapons resets the stacking buff. At 50%, a charge of killing spree is gained and slice and dice resets.
• Killing spree charges stack up to 3 times, but doesn't last as long. Slow/slow results in less, but more powerful killing sprees. Fast/fast result in more frequent, but less powerful killing sprees.
Subtlety
• Redesign shadow dance. Now a finishing move with 20 second cool down that replaces kidney shot.
Enter the shadow dance for 1 + 1 per combo point seconds, concealing you from sight and allowing the use of stealth abilities. Whilst shadow dancing, all attacks deal shadow damage and maximum range is increased to 20 yards.
• The whole idea is that sub rogues are basically shadow and melee damage dealers. They're sneaky as fuck and they are the shadows.