Nasus win rate vs. play rate is weird

So according to op.gg despite having a decent pick rate of nearly 4% (average is 3%) however his win rate is averaging at 46.45% with it dropping the last few patches. I was wondering if now would be a good time for riot to try a small buff especially geared around his utility. Something like the armor shred on his e or the lvl 1 slow on his w. Or something along the lines of base stats such as a small move speed buff like 5-10 move speed or a health per level buff to help him in his role as a tank/bruiser.