|buildtool not executable||
The build tool (Build.PL/Makefile.PL) is executable. This is bad because you should specify which perl you want to use while installing.
Change the permissions of Build.PL/Makefile.PL to not-executable.
This distribution has .pm files with inconsistent versions.
Split the distribution, or fix the version numbers to make them consistent (use the highest version number to avoid version downgrade).
This distribution is not required by another distribution by another author.
Convince / force / bribe another CPAN author to use this distribution.
Excellent. Your distribution passes all the experimental metrics.