First off, bravo for putting so much effort. It shows you care about the idea, which is great.
But unfortunately, I do not think we need seasons. My ultimate question to you is.. why? Why should Mojang add so many game-changing mechanics... for realism? I fear some of these features, such as dying from heat or cold, could make the game less enjoyable overall.
The logistics behind it are also an issue. The world would have to reset every day to create a "seamless transition" with textures constantly altering depending on the "temperature". Your system is the best I've seen, but it still runs into this dilemma.
Lastly, do we really need seasons? If you want to hang out in the Minecraft Spring, go to the Forest. If you want to build in the Minecraft Summer, go to the Plains. If you want to thrive in the Minecraft Winter, go to the Tundra. The only season not already represented by Minecraft is Autumn. I think it would be more practical to just create a new fall biome. For one, your builds would never be ruined by a season. For another, the player would have a greater reign of choice.
Sorry, but No Support.