modulate start, loop start, and loop times with the native sampler
You found a tool that does it, pretty much as good as the API allows:
https://forum.renoise.com/t/new-tool-3-0-loop-control/41463
Auto MIDI mapping like Ableton:
This comes pretty close?
http://www.renoise.com/tools/getpluginparams
Save and recall Grouped tracks
Hm, I guess you are looking for a way to save partial snippets of a song?
Phrases might be an interesting workflow to explore…I don’t think a tool exist for group-based “presets”.
Global Macros
Sounds cool, I wonder what they are 
Time measuring tool that automates default pattern length, highlighted areas, LPB, and can change through out the song.
Perhaps you could explain what you are trying to achieve here?