@CrazyG Because it is much better to settle such thing before starting playtesting, and since it is also critical for naming, here are my ownership changes suggestions:
Channel islands: France->UnitedKingdom
Because they were part of Great Britain (as far as I know, but don't know much about those, so maybe check it).
It overboards a little to the east, but that is certainly Calais, part of France.
In the moment Belgium01 is France, Belgium02 has to be France too, for having a sensible border.
This is controversial, but I feel that territory is representing the Moselle and Meurthe that were annexed to Germany after the Franco-Prussian war of 1870.
Visually, I thend to think that France19 and France20 are those territories that Germany would lose to France after WW1:
Poland15, Poland21: Russia->Germany
The Silesia area appears much too flimsy to me, with respect to historical borders, thus this redistribution would put it closer to the actual dimensions; then moving the factory from Poland22 to Poland14, if that would be, then, Breslau.
Ukraine02, Ukraine04: Russia->Austria-Hungary
If you compare it with the map dimensions of Moldavia, Austria-Hungary should have some more territory to the north-west of it (Galicia); so I think this redistribution would put it closer to the actual dimensions.
Not clear cut, but seems the north-western part of Serbia, in the moment Croatia01 and Serbia01 are Montenegro (on the other hand, if that is Austria-Hungary, then I would say Serbia07 should be Austria-Hungary too).
That looks more like a piece of Bulgaria.
Italy05: Austria-Hungary->NeutralNations (Italy)
That would be certainly part of Italy, if you look at Italy after WW1 (as you would certainly add Italy04, Italy05 and Trieste). If you look at what Italy annexed after WW1, that is not as clear, but most likely still part of Italy. Moreover, Italy05 would (be needed to) represent the piece of Italy that Austria (or rather Germany) conquered in the course of WW1, assuming Italy06 is mainly Venice.
Tunisia08: France->NeutralNations (Italy)
Maybe debatable, but this looks much more Libya than Tunisia.
Sinai01, Sinai02, Sinai03: OttomanEmpire->UnitedKingdom
Didn't the British control Sinai before the Ottomans joined the war?
The above is limited to the starting ownerships only, and doesn't take into consideration what is triggered to change in the course of the game (maybe I'll do a follow up about that, if this proved useful).
Also, about Otto, the war started in July 1914, while the Ottomans joined in November 1914, but I see that Italy joins on round 2, so your assumed timeline is 24 times faster than what I would (as I would say 1 round is half a month here). So, just saying.
Also, about Italy (and similar occurrences), when that happens there is a terrible cacophony of conquering territories sounds. That can be quite unpleasant, if you have the sounds volume at some level. Something needs to be done about it, or the conquering territory sound is better to be set to NONE (but this would be generally bad).
Here it is your map with my suggested changes overshadoved as contested: