If you do not want to read the rest of this gist, I will simply provide you with a short and thoughtful summary, that being:
Feather client will never be supported due to the nature of it breaking certain mods, us having to deal with the headache called support, and the many frustrations that come with adding it as a supported platform. Due to this, we strongly recommend users not use Feather Client for the purpose of both the developer and your sake. While you may like the features, developers will hate the burden that comes with maintaining their mod for the client.
I have been dealing with modding support for a while now (Almost precisely 2 years), so I have some first hand experiences with the issues caused by this client. While it may not cause issues for you, it causes a lituny of issues for the developer(s) working behind the mod.