Make it possible to change the directory of extension data.
I would suggest to make it available to change the data directory for extensions. For example in case of the SEO Toolkit:
It will save data in /usr/local/psa/var/modules/xovi/, but I would prefere it to be saved in /var/plesk/module/xovi.
Upd: Sorry, we are closing the request as no information were provided for over a month.