For example, the Exodus scifi game is 5e, but tweaks the skill list for the sake of setting flavor and utility.Aren't skills the same as trad 5e?
5e favours the Tool Proficiency for some of these.I am considering adding a Clockwork skill, for clocks, pulleys, gears, machinery, contraptions, traps, mathematics, and construction projects.
Loosely tying DEX to Athletics. Both 5e and Level Up do allow a DM to ask a player to use a different ability score for certain skill checks. For instance, a character might use DEX instead of STR to climb a smooth wall for a short distance or to make a jump onto a moving creature. Or the DM might ask the player to make a CON (Athletics) check for any athletic movement that lasts for more than a minute.Not a fan of your idea for tying Dexterity to Athletics.
why?I deleted Acrobatics, and instead gave Athletics to Dexterity, relating to Reflex.
So now Athletics handles all agility and mobility challenges: Speed, Run, Jump, Fall, Tumble, Climb, Balance, Aerial Stunt, and so on. It is the go-to Skill for swashbuckling characters. It is no longer to invest in both Strength and Dexterity to create an agile swashbuckler.
I added a Lifting skill for Strength. This is for powerlifting and extreme texts of Strength. Weightlifting is literally a reallife skill, that one must learn and work at, in order to lift heavier weights. It is also the 'Break Doors / Bend Bars / Lift Gates' skill. Carrying heavy loads while traveling is normally a Constitution (Lifting) check.
As a rule of thumb: lifting and throwing ones own bodyweight around is a Dexterity (Athletics) check. But lifting and throwing someone elses bodyweight is a Strength (Lifting) check.
Loosely tying DEX to Athletics. Both 5e and Level Up do allow a DM to ask a player to use a different ability score for certain skill checks. For instance, a character might use DEX instead of STR to climb a smooth wall for a short distance or to make a jump onto a moving creature. Or the DM might ask the player to make a CON (Athletics) check for any athletic movement that lasts for more than a minute.
This is kind of what @Yaarel meant by skills being somewhat fluid.
I deleted Acrobatics, and instead gave Athletics to Dexterity, relating to Reflex.
So now Athletics handles ALL agility and mobility challenges: Speed, Run, Jump, Fall, Tumble, Climb, Balance, Aerial Stunt, and so on