Cool suggestions. My thoughts here if it helps, and a couple questions — expanding cranking pulse width options would be useful in some applications. I have had no issues with instant starts on hot or cold days by simply keying on and off a couple times to get more injector prime if it needs it. This assumes your warm idle tune and cranking settings are good, so it only needs a bit of an extra shot on very cold mornings. It effectively works like pumping the pedal on a carb, so it fires right off and WUE takes over from there. It might solve your issue while you wait for the feature, and if it works as well for you as it has for me (only one starting stall, ever, in years of daily use without CPW), then you might find it's not a problem to deal with it like a hot rodder. Even better, features like this in MS were mostly done by the community, so they didn't have to wait for James or somebody to make it happen. Write some code, test it, and put it up for a merge!
#2 is needed, but it's going to be a struggle, as there are so many different advance angle systems out there and each type will need it's own decoder to function. Also, some are +PWM to hold an angle (like an typical PWM IAC), and others are ±PWM to move and zero PWM at target position (floating). This makes for quite the list of systems, and we can start a list of users for each type to get a sort order of first functions if/when it is pursued. Perhaps you can list your system properties here, and we can start a thread for willing testers when it looks like noisymime will have the feature on the short list.
For #3, it would be helpful to list how you want to select it on/off for use, and the operating parameters. It might also help in defining the feature if you specify the racing mode you use them each in, and what variables are needed for the way you would use it (a VSS input would be an example for rally cars). If more people can use it effectively, and it can be configured to not excessively endanger hobby-level engines and parts, it will climb the to-do list quicker. This is another one that you might get coded quicker, and those wanting it bad enough can simply mod their code with copy/paste from you before uploading to their Megas.