The overall ratings with this roster really don't mean much. A lot of players who aren't amazing (IE Chris Anderson 80OVR) have those because the game weighs certain stats more importantly for different positions. slimm44 has used a lot of advanced statistics (Like percentage of blocked shots the reason for Anderson's high rating) In order to establish the ratings for certain attributes. This does not mean that you want to play this player more than another. I looked up Kravtsov and if there is one thing this guy has going for him is that he can definitely dunk and is really athletic, especially for a big ole white dude.
Back to the way OVR's are established. Say you have a point guard who has a really good passing rating and other attributes are just average then you have a guy who say is really good on defense, and above average at everything else. Because the game weighs passing more than say blocking for a point guard it is possible for a player who isn't very good to have a higher OVR. Also heavily factored into OVR's is the awareness stats. Drummond has a lower awareness stats than Kravstov because Kravstov has been playing professionally for a few years in europe so he's more developed than Drummond is. His potential is likely lower. The way these rosters are set up allows for more realism by having guys that are only good at one thing actually only being good at one thing.
Because the tendencies of each player along with the attributes have been edited every player plays the way he is supposed to. Relying on the OVR in these rosters is not advised. This helps in association where the NBA scout is actually useful now which is neat.
But it's important to realize these rosters are a projection of how these guys will be this year. If you don't think this guy will be able to compete in the NBA then lower the guy and take away the sig skill. The sigs are more than anything subjective at best. What you should be upset about is that it took slimm44 and the others a little under a month producing much more realistic rosters where 99 percent of guys play the way they should in their
spare time. I imagine if they just paid a guy to actually research and edit the tendencies and stats it would only take like a week and he wouldn't have to put in all of this work.