RS3 has enough agility courses as is - they just need to make a few existing ones more viable. A mechanic like marks of grace could easily be implemented to existing courses as well.Improvements: Tooltip / (F2P) QoL v2 Quick Fixes: Invention
The reason I’ll support this is because I think diversifying skilling is a good idea. If we did rooftop agility courses there’d need to be some sort of gimmick that would make them useful without rendering other courses obsolete or being dead content on release.
I think a good example is the Hefin & Anachronia agility courses. Anachronia offers better xp and you are inadvertently making money (surge codex) brute Heflin is easier and requires far less concentration.
Perhaps, the first 20 laps at a rooftop agility course can yield better experience than its counterparts? Then afterward having negated experience?
Maybe the can reward you with silverhawk Feather?
Support if it works something like that. Otherwise, as the others pointed out it’s not really needed.