Hey there An1ma!
Thanks for taking your time to voice your thoughts about defog gliscor in the pvp meta. As said here:
Gen 7 isn't fully implemented yet in PRO. The abilities, movesets, and quite a bit more still need to be implemented, and we don't have any eta on this unfortunately. Until gen 7 is ready to be implemented, PRO will work according to gen 6 principles. At the moment we are focused on bring our other projects as well as gen 7 to life. Thanks for the suggestion, and we intend to cross this bridge when we get there. There is a bit of work we have to finish first.
If you wish to discuss poison heal gliscor in the gen 7 meta, and why you think it should be unbanned when gen 7 comes to PRO, by all means feel free to do so. We will be more than happy to read the feedback and take it into consideration when the time comes for us to make this decision.