There is a faster coral than red but it's with the elites who are starting in a different place about a mile or so further back. You had to be able to prove you can run a sub 3.15 marathon to get in there and had to send proof when you applied.
You'll just have to start at the front of the red coral to get away quicker, that's what I plan on doing
I suffer from the same thing when it's cold, my fingers turn white and change colour when they warm up. It could be something called "Raynaud's Syndrome", look it up on Google, all the symptoms that you are experiencing match the symptoms of this condition. I'm not sure if this is what I have but I'm pretty sure it must be.
Like most other runners I suffer from tightness in my glutes, hamstrings and calf muscles. I have a regular session with an osteopath every 4-6 weeks to keep on top of everything and is more a prevention thing to catch niggles before they develop.
I did have a problem with my ITB which I tried to run off about a year ago but it got the better of me and I was off running for 2-3 weeks, I now go to the same osteopath every time who treated me back then.