Suggestion: add a directional indicator to Rengars exclamation point
Currently when the warning appears you don't know if Rengar is flanking you or coming from the side, you could be running right into him, adding a directional indicator could help with this, not something that would point directly at Rengar since that would make him easy to hit with skillshots while stealthed, but maybe something that pointed in one of 4 directions, kind of like how Fioras passive works.