Effect/Filter parity with Photoshop/Indesign/After Effects
Many of the effects in Illustrator seem to be only half implemented (in comparison to PS/AE/etc). Illustrator's glow/shadow/etc effects only have a few options compared to the same effects in other Adobe apps, which makes them less adaptable & powerful. Please beef up the effects (and add new ones, such as directional feather/gradient feather/inner shadow) in Illustrator so that they match the offerings in Adobe's other apps.
Andrew Anderson shared this idea