How can you never improve even just a little bit at all even when you play as OH for forever!
Koshelevaeven Boskovic can dig and receive better then her and she is Opp. Hell even Diouf is better! XD
I know, right! Hell, Boskovic is among the better at receiving and digging amon opp's. Many other, weaker, opp's are better at those things than Kosheleva.
But the real trouble with Koshe is that her attack has regressed to the point that it can no longer compensate for the non-existance of her defence. That is why, even though she will continue to be a superstar in name for many more years, she will ultimately do more harm than give advantage to any team she plays from now on.