AFAIK the current gates 32-34 will become dual use gates that can be used for both Schengen and non-Schengen flights. The waiting areas for these gates won't be very big though as I don't think they will increase the size of the terminal building but rather just divide the current space with movable glass walls. But anyway it will be a good addition at least to the morning wave as less bussing for Schengen flights is needed.

Something strange with Blue Wings map.

Gates 25-33 it's 8 gates with bridge and Blue Wings skips number 31. 31 is renamed as 32. But what is gate 33?

In Finavia's map and in real life 25-31 it is 7 gates with bridge.

I dont get it.

Finavia's page about the expansion program shows that the building would be expanded for gates 37 - 39 (to our surprise). Remains to be seen how correct that is, unless someone over here has access to the information.

Dual-usage gates will require separate access to/from the Schengen area, so that alone would require one more floor. Guiding arriving Non-Schengen passengers to Aukio will also require it.

The South Wing and the 50A-M bus gates already showed that Finavia doesn't want to offer seating at gates anymore, so I'd still expect most of the seating to be enhanced away when gates 32-34 will be renovated to 34-39.

Gate 33 in the map mesmerized me as well. There would be room for one new gate between the current Schengen and Non-Schengen gates, maybe one will be built?

Renaming gate 31 seems logical to avoid confusion with 31A-D. The same thing was done already with gate numbers 50 and 51.

I only now noticed on the Finavia page that gate area at 17–19 will also be expanded, opening in June 2019. Has this work already been done? I haven't noticed anything but I'm rarely there anyway.

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I believe that extension is to allow for the upper floor transit, just like arrivals at south pier is supposed to stay on upper floor until reaching central plaza.

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And now I've looked in Blue wings magazine and see the confusion. What is labeled in the Finavia sketch as "extension 37-39" is the expansion to north to accommodate the transfer lanes to plaza.
In BW 37-39 are new busgates, just like new 34 and new 36, I assume. Unless floor plans have changed entirely.
Current 32-33-34 has become 35, 40 and 42 in in the BW sketch. Their locations corresponds to the construction floor plans as the jet bridge gates are planned to be further apart than currently.

New taxi stand is now active in the basement. There are signs directing people there, but people flows cross paths very badly in the ground floor. Total circus, only clowns are missing (unless you count hi-vis guys directing the taxis).

New gate number 42 now in use

What machne is this? M83?

Funny enough yesterday at the JFK FL an old man noticed my AY bp and told me his transit at HEL was painful due to the lack of moving walkways and narrow hallways on the Schengen side

H�p�. Everyone knows "under one roof" is what counts...