Are there any more plans for Darius? As Darius main i must say E slow nerf and Q widht nerfs were definetly noticable but still his Q heal feels too strong,in 5.16 was 10% per champion and 30% max,that felt to me pretty ok,since his Q has low CD in late game 30% heal is pretty enough.

Not at present no. We'll see how things in the Preseason shake out, but if anything we're worried we actually overnerfed him but we'll see how people adjust. The Q radius change was far more potent than we predicted.