Unfortunately, the Judicial Committees are NOT deemed illegal in Finland.
The story you linked to is pretty old. It was published before the "investigation" into JW Judicial Committees...
I am going to copy paste what I wrote about this in another thread:
The "investigation" was like this: The Finnish Minister of Interior and Minister of Justice met with three top dogs from the Finnish Bethel, and apparently, they managed to convince them everything is fine.
The Ministers issued a press release saying, in essence, that Jehovah's Witnesses Judicial Committees are not a judicial system competing with the Finnish judicial system, and the JC's can be likened to disciplinary measures taken by any non-profit against its own members. And if somebody feels like a crime has been committed against them, they should go to the appropriate authorities.
So as long as nobody files a criminal complaint against the WT and the case is not taken to court, and ruled against the WT, JCs are assumed legal in Finland and it's business as usual for the WT.