Kolaja is pretty much the last one standing that is still interested in digital rights. Unfortunately the MEPs aren't that important in the party (any party): spending a lot of time in Brussels means being far away from the local headquarters, where the real decisions are being made.
For an impression of how the party is ticking now, just register in their phpBB run forum: forum.pirati.cz and run the discussions through the automatic translator.
I cannot recommend any truly neutral sources about people like mayor of Prague. There is an election coming soon, he will likely lose his seat. One of the reasons is that cost of living has gone through the roof. Many people move to Prague, but almost no new housing is being built. The prices are 2,5x as high as ten years ago. People draw unfavorable comparisons to Warsaw, which is very dynamic and at the time still affordable to the middle class.