There is a step in there that I don’t understand.Because I do not want to remove Rogues and Monks ability to have more flexible Bonus action for double Dash, but still give option for all classes to get 3×speed in some situations.
edit: low blood sugar sometimes makes me suck at extrapolation. I get it now.
I think I’d go some other way to balance it, or, make full run a general rule without those restrictions and an athletics check to increase speed, but give a character who can dash twice advantage on athletics checks to determine extra speed.
The monk and rogue are balanced by the monk’s extra movement be the rogue’s Expertise and eventual Reliable Talent, Barbarians are faster while raging, fighters...need an extra skill and 1 Expertise tbh.
Rant: Also Natural Explorer should give movement oriented benefits that are especially helpful in the associated terrain, but can be useful anywhere, like ignoring difficult terrain when dashing for Forest, and acclimation to things relevant, like high altitude, or the pressure of the deep, etc. Things that translate survival skill into non-travel related benefits. /rant