With this year's World Cup format, the NLA doesn't have to say anything about their willingness to release players, cause no team in the tournament would be interested in these guys anyhow:
http://www.eliteprospects.com/league.php?leagueid=NLA&season=2015
Taking the best Swiss players away from the NLA wouldn't be easy (and this might mean that Switzerland would be missing some players they'd like to have), but it would be a lot easier than bringing the A teams of Latvia and Belarus to the tournament, cause no club team in Switzerland can acquire half the national team the way Dinamo Riga and Dinamo Minsk do.
Finland can't fill an NHL roster. At the moment, we've got four NHL defensemen.
The sentence strucure was missing a comma. To convey your message it should have read "seeded, not determined, by IIHF rankings" instead of "seeded, not determined by IIHF rankings".