Something i read about Randle and his abilitys and projections :
A 6'11'' wingspan is enormous in most contexts, but not the super-sized world of the NBA paint. When matched up against the best power forwards in the world, he's going to have a significant length disadvantage, a problem that could impact his game on both sides of the ball.
Among starting PF's in the NBA, Randle's wingspan would rank dead last. The average is well over 7'0; even undersized 4s like Paul Millsap (7'1.5) and Brandon Bass (7'2.5) have an advantage.
That doesn't mean Randle won't be able to score at the next level. Even without great length, he's got a massive frame, a high motor and a nose for the ball. However, he will have to diversify his offense to thrive. In college, he mostly bullies power forwards who can't match up with him physically. In the NBA, he will have to be a better shooter and he will need to use his right hand. No matter where he is on the floor, he always goes back to his left. It's funny when you start watching for it.
The real concerns are on the other end of the floor. Randle averages 0.1 steals and 0.7 blocks, awful for a big man with his athleticism. Kevin Pelton of ESPN Insider has found that block and steal rates in college are important tools when projecting big men prospects. I suspect that's because they capture the problems players with comparatively short arms can have.
It's hard to build around a player with Randle's skill-set. He is a post-scoring big man who can't protect the rim. If you play him with a big man who can't stretch the floor, there won't be much room in the paint for him to operate. If you play him with another big man who can't protect the rim, your defense will be limited. There aren't many NBA centers who can shoot, block shots and play hi-low to preserve proper spacing. Randolph didn't find much team success until he started playing with Marc Gasol, one of those rare birds. The same dynamic has blunted the impact Al Jefferson and DeMarcus Cousins make on their teams despite gaudy offensive numbers.
And while Randle should average a double-double in the NBA, his style of play is not conducive to the way the league is going. More teams are spreading the floor and playing with four shooting threats, which won't work with Randle, since he doesn't have the defensive chops to be the lone big man on the floor. He will have to be on a two-post team like Indiana or Memphis, one that slows the tempo, maintains spacing and throws the ball inside. However, that's a style many guards aren't comfortable managing.
In the right situation, playing next to one of those rare floor-spacing and rim-protecting big man like Serge Ibaka or Anthony Davis, Randle could be a really good player on a championship-caliber team. In the wrong one, though, drafting Randle could end up setting a team back significantly. In the NBA, the shorter your arms, the harder it is to reach your ceiling.