I think the art and lore people need to establish a theme and direction for Taric first before the gameplay team would devise a kit for him. What makes you think the art team's running late?
Play another champ if you don't like Taric's current kit. There's over 100 of them, I'm sure you'll find something to your liking.
Riot's trying their best to make a cohesive, healthy, and interactive play pattern for the guy, which (aside from Cass) has really paid off for them so far. No need to yell at them to work harder. They get that people love the guy and they're keeping them waiting, so please stop being rude.