The rest of Valanciunas' game needs refinement, particularly his ball-handling and passing abilities. He turns the ball over at a pretty high rate and definitely has a ways to go in terms of improving his basketball IQ and overall experience level.
The place this seems to show up most is on the defensive end. Valanciunas is a major presence in the paint with his terrific size and length. His mobility helps him out quite a bit as well. He can contest shots around the rim and has good timing for blocking shots, even if he's not what you would call a high-flyer.
With that said, he's not the smartest, most reactive player you'll find right now, especially on the perimeter, which can lead to some poor rotations and open shots for opponents.
Interestingly enough, even when you see him getting beat at times outside the paint he still has the ability to recover and make a play at the rim, which is a testament to his foot speed and wingspan.
Nevertheless, he's still gaining experience and learning the nuances of the game on this end, which is one of the main things holding him back from getting even more playing time for Rytas.
Inside the paint, Valanciunas is a frequent target for opposing teams to post up due to his narrow frame and lack of experience, especially in the Euroleague, where almost every team has a bulky old school back-to-the-basket pivot who can simply overpower Valanciunas in one-on-one situations.
That's a big reason why Valanciunas has had consistent foul problems over the course of the year -- another reason that his playing time has been limited. In the Euroleague, for example, he commits approximately one foul for every 4 minutes he's on the court.
Despite the negatives described here, Valanciunas is undoubtedly an outstanding prospect, especially when we consider that he doesn't turn 19 until May. Players with his combination of size, length, mobility, toughness and budding skills are extremely difficult to come by.
The fact that he's producing at the rate he is in the Euroleague, Lithuanian league, and VTB League at his age is an extremely positive sign. Considering the tools he has, it's safe to say that his upside to continue to improve is huge.
It's easy to see him developing into an Andris Biedrins-type rebounder/defender/hustler in the NBA, but he likely has more even potential offensively than the Latvian big man due to his superior hands and touch (he probably has more of a nasty streak too).
