Not yet, I say!
I believe we should restrict the colouring for a few more rounds, because often premature colouring spoils a great concept. Seriously guys, don't stop thinking! Make our snailvase as handsome as possible first!
A larger head accomodates larger eyes, don't you think? They're just empty sockets as of now, but anyone can go there and give realistic eyes! I've improved the space for it a bit. A crown-thing also adds detail, and joining the legs with the shell makes our snailvase a true snail! From vase to snail, we've done a lot of effort.
Some things to think about before rushing to colour:
Better hands? Maybe something gooey and grimy, like Grimer's.
Better head placement? As of now it's more like a placeholder, and you can totally improve upon the moustache and head features.
Extra details? Something like antennae or spots would help our snailvase.
Conjointed leg area? As of now it may be clashing with the concept. Perhaps we can remove the upper outline on the legs, and extend them a bit.