The polling methods are not not sophisticated enough to reach a wide spectrum
I wouldn't be so sure - you only need a sample of around 1000 for it to be reliable. The more interesting thing is to observe what happened last May - people declared support for Konfederacja, but then actually voted for PiS. I think it could happen again, especially among voters for whom voting for PiS would be seen as a faux pas socially.
About what you've just posted - from an aviation point of view, is there any real sense in trying to compete directly against Berlin-Brandenburg? The LOT strategy of developing a solid CEE network combined with long haul flights to Asia wasn't a bad one, but Warsaw is poorly located for long haul flights - Istanbul and the ME airports are better for 'one stop' connections, while Helsinki has the advantage of being close to Asia. I'd much rather see Warsaw become the undisputed capital of CEE flights - do you know what Air Baltic are doing in Riga? That really should be LOT's speciality - a decent network of short/medium haul flights going to Warsaw for business reasons, while maintaining a reasonable long haul network to Asia (and the US). The CPK just isn't needed - it would make more sense to simply make sure that Okęcie is for premium connections, while getting rid of Wizzair and Ryanair out to Modlin where they belong.
The other problem I have with the CPK - it kills domestic flights on most routes, with the possible exception of the Szczecin route. No-one is going to travel all the way out to the CPK just to fly to Kraków or Gdańsk. Business travellers like Okęcie (as they like Tegel) because of the location - it's hard to compete with 20 minutes from airport to downtown.
I also think Berlin-Brandenburg is absolute stupidity for so many reasons, and I was against it from the beginning. Lufthansa won't create a hub there, and Berlin still sucks compared to Munich and Frankfurt economically.
If you think about Berlin, Tegel as the 'business' airport and Schoenfeld as the 'leisure' airport was perfectly fine, just as Okęcie as the 'business' airport and Modlin as the 'leisure' airport.