Sword of Spirit
Legend
I too was disappointed with the 5e rogue assassin. I would be fine with it being a rogue subclass, except there isn't enough room to include the essentials of a D&D assassin.
In 3.5e I expanded the assassin prestige class into a full class, and it looked pretty good (never actually played it).
For me, in a D&D assassin, I like arcane spellcasting. I know it was a 3e innovation, but since we're bandying about 4e innovations, I assume it's legit.
What I currently do is stick with the official subclass but have a ubiquitous order of assassins that take Magic Initiate wizard.
If I were making a base class I'd be tempted to make it a half caster. D8, start with rogue proficiencies but grant martial weapons. Maybe leave disguise and poison to kit proficiencies or Expertise. Look to various ranger subclasses for DPR inspiration, with some sort of particularly lethal attack option. But making it a half Int-based arcane caster gives it a niche that means it doesn't need as much innovation just to have a place.
Probably not quite what anyone else would want, but thought I'd share.
In 3.5e I expanded the assassin prestige class into a full class, and it looked pretty good (never actually played it).
For me, in a D&D assassin, I like arcane spellcasting. I know it was a 3e innovation, but since we're bandying about 4e innovations, I assume it's legit.
What I currently do is stick with the official subclass but have a ubiquitous order of assassins that take Magic Initiate wizard.
If I were making a base class I'd be tempted to make it a half caster. D8, start with rogue proficiencies but grant martial weapons. Maybe leave disguise and poison to kit proficiencies or Expertise. Look to various ranger subclasses for DPR inspiration, with some sort of particularly lethal attack option. But making it a half Int-based arcane caster gives it a niche that means it doesn't need as much innovation just to have a place.
Probably not quite what anyone else would want, but thought I'd share.