The expense is part of the design, but you will note the Spearhead is more expensive in resource cost than the Thunderbird. It's only because the Cannalans control the strategic resources that it's cheaper
[4 Ore (1 Ti), 4 Oil] vs [4 Ore (1 Ti, 1 Al), 4 Oil]
Both sides start with 1 Al.
Point irrelevant.
If you look back at the very analysis you posted, armament isn't an issue because both planes tend to be glass cannons and an autocannon burst will bring them both down regardless of calibre/number.
There are more things in the sky than jet fighters.
Cannala's jet is much better at shooting down bombers.
And I don't believe we were ever going to use mixed ammunition belts on plane guns in any case.
That would be stupid. We would already be using mixed belts ages ago had it been possible. We know how to make the ammo.
It's stated explicitly in the turn. Also, under the Plains section, the Cannalans are only at parity with us when they also aren't hobbled by relative carrier limitations. Honestly, read the turn.
And we still have the advantage of different planes designs and Air General there. The fact that we're equal clearly indicates the Cannalans are superior.
Before either side introduced Jets, the Cannalan's were loosing heavily.
Regardless of your opinion on the relative power of the Jets, you can agree with me that the Cannalan's don't have nearly as much trouble taking the air than we have taking the Sea, right?I still think it's worth pursuing a good naval design. The reasons we didn't do well even though we spent many design on it is because of duplication of effort: we invested a ton in carriers and little in the other ways to get naval power. The marginal improvement of each carrier is diminishing. We need to get gun cruisers/BB, submarines and more stuff out therE.
I agree that further Carrier development is useless. However, I don't think any other naval development will help.
We're too far back, and the enemy has such great advantage that they can get away faster.