aviation is one of my strengths, I will complete / clarify my proposal :

Air Superiority Fighter :

• Mirage F1
  
• Mirage 2000C
  
• Rafale C (with 2 fuel tanks)
  

Strike Fighter :

• Jaguar A
  
• Mirage F1CT or Mirage 2000N
  
• Mirage 2000D
  

For the naval fighters, it will be necessary to associate the Rafale M with a plane of American origin.

I will be recommending the F-35C as a naval strike fighter for both American and French tech tree. The other possibility will be the F / A-18 Super Hornet who would then be the naval air superiority fighter on both sides.

this is my personal proposal :

Naval Air Superiority Fighter :

• Crusader
  
• F/A-18C Hornet ??? (this is the main possibility)
  
• Rafale M (with 1 ventral fuel tank)
  

Naval Strike Fighter :

• Etendard IVM
  
• Super Etendard
  
• F-35C Lightning II
  

In such a case, there would be no need for a stealth strike fighter. We would have more than one stealth fighter model. It would be more like an air superiority fighter. We could then possibly keep the MBB Firefly IV for lack of a better proposal.

for attack submarines, it would make more sense to leave on nuclear submarines. as there are only 2 real class of French submarines, I propose to create an intermediate class corresponding to the AMETHYSTE modernization.

Attack Submarine Tier 1 : Rubis-class
Attack Submarine Tier 2 : [i]Améthyste[/i]-class
Attack Submarine Tier 3 : [i]Suffren[/i]-class

for aircraft carriers, I tend to agree with your proposal:
Aircraft Carrier Tier 1 : Clemenceau-class
Aircraft Carrier Tier 2 : Charles de Gaulle-class
Aircraft Carrier Tier 3 : ???


the only possible solution for Tier 3 is the CATOBAR version of British Queen Elizabeth-class carriers. We could then create the Richelieu-class to represent this adapted version.

CVF FR "PA 2". Based on the Elizabeth Design. It has been canceled in 2013, but it's the latest Aircraft Carrier design we have in stock, and it was planned to replace the Charles de Gaulle.

Quite, the last design that we are in stock. more than to replace the Charles de Gaulle, it had been considered as a complement to have two aircraft carriers in service. However, you must give it a name to integrate it into the game.

Under all probabilities, it would have been Named "Richelieu", hence Richelieu-class

For personal reasons, I could not think of the rest of the navy.

but with the game that classifies the anti-aircraft ship as a frigate and the anti-submarine ship as a destroyer, one will have to either juggle a little or cheat on the capabilities.

anti-aircraft defense ship:

• Tier 1: Suffren-class
  
• Tier 2: Cassard-Class
  
• Tier 3: Forbin-Class / Horizon-type
  

anti-submarine ship:

• Tier 1: Tourville-class
  
• Tier 2: Georges Leygues-class
  
• Tier 3: Aquitaine-class / FREMM-type
  

for cruise missiles, there is a big misclassification.

indeed, if the ASMP can possibly be classified as the Tier 1 missile, there is a reversal between Tier 2 and Tier 3. Indeed, the SCALP-EG / Storm Shadow could also act as CM Tier 2, CVS401 Perseus is a clearly Tier3 missile as it exists only on paper.for cruise missiles, there is a big misclassification.

there is also a small typo error concerning the SSN since the Tier 3 is written "Suffre-class" whereas it is well "Suffren-class" like the frigate of Tier 1.

for corvettes, I think we have to review things with:
- D'Estienne d'Orves class for Tier 1:
- EMPTY (possibly Lafayette class who are poorly armed)
- GOWIND type for Tier 3

I thougth Lafayette were Frigates, no ?

possibly use a VBL mistral for a mobile sam?

lol

for mobile SAMs, I envision a longer-range system than portable missiles like mistral.

Especially in Tier 2 and Tier 2 where precisely the Mistral could then a place. it is also the whole of the antiaircraft function that may pose a problem.

Heavy Bomber:
Mirage IV

Dassault Mirage IV was a French supersonic strategic bomber and deep-reconnaissance aircraft.

do the devs even look at the forums for ideas, seems these tech trees aren't going to be implemented

they indeed look but why would this be implemented? it's one country doctrine for a huge work