Normally stuns are loud and sound impactful. Good examples are Taric, Irelia, Sion, and Kennen. But cocoon ends up sounding like a snare, when it's a stun.

Elise is UP (UnderPowered) anyway, so the sound effects doesn't really matter right now, the thing they must fix is her sustancial problem, she has a little bit of everything and a lot of nothing... She doesn't excels at anything, and we gotta chose to build her as an useless tank (with only 1 cc) or building her as an extremely vulnerable ap bruiser, which she isn't quite qualified for doing it neither..