Hi Juanito
Just some observations:
It appears the .rules file did not exist prior to TC13.
Also, according to the .list files, libwacom.so has been at version libwacom.so.2.6.1 since at least TC10.
The /usr/local/tce.installed/libwacom file also appears to be a new addition in TC13.
These files also appear to be new to TC13:
/etc/hwdb.d/65-libwacom.hwdb
/usr/local/bin/libwacom-list-devices
/usr/local/bin/libwacom-show-stylus
/usr/local/bin/libwacom-update-db
These notes apply to x86 and x86_64.