AFAIK if you have a regex with named capture groups there is no direct
way to relate them to the capture group numbers.
You could do (untested; Python 3 syntax):

    d = {v: k for k, v in match.groupdict()}
    for i in range(match.lastindex):
         print(i, match.group(i), d[match.group(i)])

One possible solution would be a grouptuples() function that returned a
tuple of 3-tuples (index, name, captured_text) with the name being None
for unnamed groups.

Anyway, good luck with all your improvements, I will be especially glad
if you manage to do (2) and (8) (and maybe (3)).