Can he play this year?
In all seriousness, I think the hankering for a shooter is overstated. It would be nice, for sure, but it's not the screaming need that it's being billed as - Vance was a top shooter in his class, and in recent games, he's been that guy. At the very least, I think you can pencil him in next year as a guy who commands a lot of attention and can be installed as a deadly pop option (unlike D-Ham, he has the build of a primary screener) w/ Gilbert and Adams.
On that topic, Adams has emerged as a fairly reliable three point shooter this season. He's not Shabazz, but you have to guard him, and you can envision a scenario in which he and Jackson work off the ball with Gilbert at the point, ala Kemba and Lamb in '11.
With an entire calendar year of reps in the gym, I bet Gilbert shows up to camp a much improved shooter. Vital is showing signs of warming up (maybe not showing on the stat sheet yet, but he's not bricking them like they were earlier), and if memory serves, he was a decent shooter in high school who, by his sophomore year, could vault into 40% territory. It takes guys a while to adjust to the pace of D-1 ball - the fact that he and Jackson have struggled shooting doesn't surprise me at all.
Then there is Larrier, who, by next season, will be three years removed from his 26% season at VCU. We also don't know who else might be added from the grad market.
Long story short, a slashing type who can platoon with somebody else at the wing alongside Adams & Gilbert wouldn't be the worst thing. Offense is not by concern regarding next season. Our biggest challenge will be replacing Brimah's defense.