I might add one more suggestion, not because I'm Polish .
Team like Poland at this time happens every 40 years or more , I know I remember Wembley 1973.
All the players on Polish national team are there for reason.Most of them played at high level since they where kids , Krychowiak scored as underaged in Poland 1 Brazil 0 in World Cup U20, this team had Szczesny and Bialkowski in net.Kid Kapustka he is 18 and might go to France.Milik from Ajax is proven scorer not worst than Lewandowski ,Grosicki other winger and old guy Blaszczykowski, Rybus ,these 2 are looking for new deals somewhere. Any smart manager should recognize the situation , as I said group like this happens every 40 years.
Keeper Dragowski needs to move on to better league before he does something really stupid playing for Jagiellonia.