Character death is something very rare in modern tabletop games, outside of some games (Warhammer Fantasy, Call of Cthulhu, most OSR games) and if you're making a game where character death is easy... Warhammer is really the only one where character creation takes a while.
-Scenes will take longer because everybody's writing in prose format so rules have to be adjusted away from the basis that a 4-5 hour session will involve people travelling to multiple locations and doing a lot of different things.
There's a lot of ways to fix this, either by limited each post of a three to fix sentences, requiring people to pre-roll and pre-type in combat, do group initiative, etc.
Since this would be on downtime, if Fred Freeformer used healing magic, Dan Diceuser could easily roll the recovered hit points... Especially since it would be bad form for Frank Freeformer to be like "your character is fully healed because my magic is that powerful.-Players are going to be interacting with other system users and freeformers all the time, so if Dan Diceuser gets injured and Fred Freeformer wants to heal him, you need a way to address that.
In 2e AD&D, there was a NPC in the Ravenloft campaign setting named Rudolph Van Richten. Conceptually, he was a doctor, who's son was stolen by a vampire and killed, which set him on a quest to rid the world of supernatural creatures that prey on innocents. He wasn't a skilled warrior or magician, having to rely on other people for those things, but he was intelligent, learned, and a skilled tactician. Mechanically, he was listed as a Thief. The point is... Classes are broad strokes. Then again, having ran D&D for a long time, I sort of feel that 9/10 times when someone says there isn't a class that fits their concept, the player just wants to be Gary Stu.-RPers make individual concepts of unique character with weird powers and skillsets as a given, so class-based systems are doomed to failure.
Take a d100 system. Add a zero. In something like Zwihander, if you have 65 as your score for melee, you'll hit on a role of 65 or under. If you converted, convert it to a melee score of 650.Optionally, I prefer to make sure the system can be managed in the in-game dice roller, which was a real challenge when it was only a d1000. Makes it easier for players who are on consoles.