A visual indicator distinguishing between active and passive talents would be most welcome.

This addon is such a major quality of life improvement! Good job. :)

glad you like it :)

blizzard already shows a very clear difference between actives and passives actually 🙂, passives are round, actives are square
example screenshot:

/facepalm
I....just....wow. Thanks for pointing that out to me, 'cause that completely blew past me. /laugh