Thunder
Bio I/II/III
Miasma
Miasma II
Windbite/Stormbite
Venomous Bite/Caustic Bite
Aero III
Aero I/II
Higanbana
Circle of Scorn
You can, and it was okay because Dragoon received a huge overhaul to its core class gameplay.You can make the exact same argument for phlebotomize.
Full Thrust got bumped up from 360 potency to 450 potency since 3.x. If Souleater had gone from 280 base potency to 370, we wouldn't be having this conversation.
Power Surge was removed, and was instead built into each and every Jump that a Dragoon does, while the other parameters of Jump were unchanged. If Dark Passenger had kept its HW MP cost and potency and had simply had the Dark Arts Blind and 100 potency built in, we wouldn't be having this conversation.
Dragoon went from 4 GCDs per combo to 5 GCDs per combo, with the 4th and 5th GCDs bumped up to 300 and 400 potency respectively. If Delirium were a 4th combo GCD on Dark Knight with a potency of 350+, we wouldn't be having this conversation.
The Heavensward class mechanic of Dragoon consuming their BotD timer to use Geirskogul was removed and replaced with a powerful second-stage upgrade to BotD that gives the class a huge burst of damage under LotD. The Heavensward class mechanic of Dark Knight gaining tons of potency from Parrying and taking damage in general was removed and replaced with absolutely nothing.
No it won't kill the game, don't be dense.1 dot won't kill the game? Let's see how long it takes SMN to notice getting cred in eureka to make their relics is harder on dot classes in open world trying to grind out the best weapon in the tier. 5, 4, 3, 2,....
In Heavensward, every class could apply 3-4 DoTs or other high-uptime debuffs except for BRD (2 DoTs), BLM, and MCH (1 DoT each). In Stormblood, no class except SCH (after the restoration of Miasma II) can apply more than 2 high-uptime debuffs. Dark Knight can apply zero. Restoring Scourge is not going to cause a single problem. Period.