@ Herr B: That´s easy. After an smaller to medium Patch with Major-Minor-Countrys (like in TfV with the Commonwealth or BftP with Turkey, Greece and Bulgaria) comes an medium or an big Patch with Majors (like it was in WtT or La Ressistance).
And the Patch-Row incl. DLC´s was the following which did repair Bugfixes, done smaller or medium Refits / Reworks and the first one big Refit / Rework:
a) 1.0 bis 1.2.1 (Base Game): Bugfixing, AI and UI-Repairs, Database & Ballance-Repairs, Stability & Performance-Repairs, Content-Repairs, User-Modding-Upgrades, Multiplayer-Upgrades and implementing important missing Features & light Gameplay-Improvements [the first Minor Country get playable in the Game as an Release-Present = Poland]
b) 1.3 bis 1.33 medium Patch (Together vor Victory [TfV]): Bugfixing, AI and UI-Repairs, Database & Ballance-Repairs, Stability & Performance-Repairs, User-Modding-Upgrades; the first important Game-Rework with the Commonwealth-States Country-Pack as well as more important missing Features & first important Gameplay-Improvements [the first democratic Main-Minor-Countrys get playable = Australia, Canada, India, New Zeeland and South Africa]
c) 1.4 to 1.4.2 medium Patch (Death or Dishonor [DoD]): Bugfixing, AI and UI-Repairs, Database & Ballance-Repairs, Stability & Performance-Repairs, User-Modding-Upgrades, Audio-Upgrades; the second important Game-Rework with the first Balkan States Country-Pack as well as more important missing Features & second important Gamplay-Improvements [the first neutral to fashist Main-Minor-Countrys and an another democrtatic Main-Minor-Country get playable = Romania, Hungary, Yougoslavia, Czechoslovakia]
d) 1.5 to 1.5.4 medium to big Patch (Waking the Tiger [WtT]): Bugfixing, AI and UI-Repairs, Database & Ballance-Repairs, Stability & Performance-Repairs, User-Modding-Upgrades, Audio-Upgrades; the first big important Game-Rework with Asiatic-States and 1 European-State as well as the first big important missing Features & Gamplay-Improvements [the first Major-States get better playable and their Warlords get playable = China, Japan, Germany, Menguko, Mandshuko as well as Gunaxi-Clique, Shanxi and other Warlords from China]
e) 1.6 to 1.6.2 medium to big Patch (Man the Guns [MtG]): Bugfixing, AI and UI-Repairs, Database & Ballance-Repairs, Stability & Performance-Repairs, User-Modding-Upgrades; the second big important Game-Rework with democratic States and 2 new Maijor-Minor-States as well as second big important missing Features & Gameplay-Improvements [the second Major-States get better playable and more neutral to democratic Main-Minor-Countrys get playable = USA, UK, Mexiko, Netherlands; the first nessecarry Game-Improvement was done: complete Naval-Refit with R & D, Buildup, Instructions etc. to make the Navy playable]
f) 1.7 to 1.8.2 small to medium Patches to upgrade the Game to new 64-Bit-Standard (Base Game): Bugfixing, AI and UI-Repairs, Database & Ballance-Repairs, Stability & Performacne-Repairs, User-Modding-Upgrades, important missing Features & Gamplay Improvements [64-Bit Upgrade of the fully Game incl. existing DLC´s as new Standard]
g) 1.9 to 1.9.3 medium o big Patch (La Ressitance [LaR]): Bugfixing, AI / Graphics and UI-Repairs, Database & Ballance-Repairs, Stability & Performance-Repairs, Audio-Upgrade, User-Modding-Upgrades; the third big important Game-Rework with demorcatic States and 2 more Major-Minor-States as well as third big important missing Features & Gamplay-Improvements [the third Major-State and his Spliting get better playable and more neutral to fashist Main-Minor-Countrys get playable = France, Spain, Portugal; the second nessecarry Game-Improvement was done: complete Agengy with Agents, Collaboration Gouvernments and Intel-System as well as Occopied Zone-Management]
h) 1.10 to 1.10.3 small Patches (Battle for the Bosperus [BftP]: last nessecarry Bugfixings, AI & UI-Reparis, Database & Ballance-Repairs, Stability & Performance-Reparis to the furthermore improved User-Modding-Upgrades, Audio-Upgrades, important missing Features & Gameplay-Improvements [the missing neutral to fashist / democratic Major-Minor-Country get playable = Bulgaria, Turkey, Greece]
The red marked Patch and the small size of it shows that the Devs didn´t invest much in the existing Base Game and doing an big Base Game Refit / Rework.