It has been a year since I took a flight ex HEL but I have done so quite a bit in the past. The new lounge arrangements in HEL are a Business and F class (F class normally resrved for Longhaul Business Class and Status OW FFs) lounge in the non-schengen area. You may access either of these lounges if travelling to UK (I took a BA flight) and accessed the F/Emerald Lounge which was very like the old silver wings (longhaul) lounge. I have also used the Gateway lounge (not sure if this is still there on the non schengen side) since it used to have a smoking section (unlike the longhaul lounge). I have never had a problem entering the old silver wings (longhaul) lounge when flying shorthaul but this was always with BA status and connecting from an intercontinental AY flight.

The current lounging arrangements seem very civilised and bright but not a quantum leap ahead of the older AY lounge arrangements (the fundamental difference seems to be more space and an open plan design). The Gateway lounge was available as OW FF elite, AY/BA J PAX or with PriorityPass.