I completely agree with you. First thing I did was click on 'League' and try to change the color. Lack of an auditory signal is disappointing as well.
I ended up making a new tab with nothing but League and Team chat, to filter out all my other channels. It helped a little.
Don't mistake coincidence for fate.
Tyrant Kaiser Necro/Pois ~ 50
Moriyama Emp/Dark ~ 50
Divine Leliel Claws/Invuln ~ 50
Divine Zeruel Dark Melee/SR20DET ~ 50
Lil Mori Fire/Kin ~ 39
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XBox Live Gamertag: Loki 240SX
Team chat always has a distinctive chime when someone says something. How about having another chime for League chat. I can't speak for everyone else, but I'm not constantly observing the chat window when trying to stay alive in a raid situation. Having an alert of some kind helps me know I need to see what someone might urgently need me to know. Heck, maybe even allowing us to select from a group of chimes could be helpful (with an option for "none" of course).
Also, it might help if we could customize channel text colors. Dull greenish-grey league text doesn't really jump off the page for me.
@Rylas
Kill 'em all. Let XP sort 'em out.