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You list so many advantages of blue, and that's right, you need to list everything first to make a decision...
But here's an argument and a question for you to ponder: Why, when playing as the Cherkess, does the player who chooses the color much more often pick red?
In my opinion, it's because they believe that being red is more advantageous. And if that's the case, then there's no need to make red even stronger.
2) Following the trend - strong players usually have an aggressive play style, so psychologically, they prefer red.
3) Patterns - I've already listed where and how.
The main argument against the red rush is not that red is weak, but that the impact of the red rush on the outcome of the game is noticeably less than the hassle it creates. Because most red rushes happen on weak units that are killed with or without a bonus, or on empty castles. That's why there were often ideas to amend the rules, such as "if it doesn't affect the outcome of the battle." But due to the difficulty of determining whether it does or not, they always decided to stick with the simpler option: "no, and that's it."