That is beacause they still remember "Team scarf incident" from last year when both of them stepped on Zielona Gora team colors in Torun during final matched against Zielona Gora.
Bradford Ace I think they changed geometry at Wroclaw, new trend is to also make the tracks shorter than in the past examples of that are Torun new track at 325 meters and Gorzow at 329 meters one is new track the other was modified recently. The longest Polish tracks are at Poznan,Rzeszow,Krosno and Tarnow all at or close to 400 meters.
New silencers were mentioned numerous times during Polish Extraligue meetings on TV not one rider had anything positive to say about them ,most think they are dangerous as bikes are loosing power at times and should be banned by FIM(new silencers that is).
I know they have fairly old mechanism too at Bydgoszcz some tracks like Rzeszow have electro magnet much more reliable funny how riders from Eastern Europe speak really good polish (Vaculik,Saifutdinov,Pavlic and others)