Ultimately I really doubt that declaring would have helped this guy. That first approach tells us everything we need to know. ATC set him up real nice to intercept the localizer and this guy was hopelessly behind the airplane.. nevermind that he knowingly flew a plane without sufficient ice shedding capabilities into what is arguably the worst type of icing conditions And what would that emergency declaration have consisted of "Mayday Mayday Mayday, I'm declaring emergency because I flew a non FIKI plane into freezing rain and I can't figure out how to use the GPS. Picking up lots of ice and I'm disoriented, I set up the GPS for 17 even though you guys are using 35" ..had this guy been in a non fiki Cirrus the group here would have crucified him. Instead the immediate reaction here is to blame ATC for a pilot's extremely poor decision making skills /sorry, does that classify as a rant? Maybe..