While we decide which creatures to add mostly on our own, you're more than welcome to make suggestions. Please keep them in the creature suggestion thread, however: http://psteamcommunity.yuanyoumao.com/workshop/filedetails/discussion/655968653/141136086926312161/

99% of the time, the answer is "no". We're incredibly limited on what we can do in this regard. With this in mind, we ask that you don't suggest new abilities. We almost certainly can't implement them.

Yes. Most mods will work online provided all players are using the same version of the mod.

First of all, ensure you're not running the game with the -moddev launch parameter on. Then unsubscribe, delete all traces of Tellurian, and then resubscribe. If it still doesn't work, you can grab a manual version of the mod here:
https://www.moddb.com/mods/tellurian

The campaign is not an officially supported feature of Tellurian. As such, support for campaign-related issues is very limited. If you're having a problem with the "Unofficial Tellurian Campaign" by Nibbling Monster, please refer to that item's Workshop page for support.

Unfortunately, we don't always have a lot of time to work on the mod and so it's always difficult to give an estimated release date for new updates. New patches will always be announced when they're released, however, so keep a look out on all of our channels for news. Please don't ask us when a patch is coming. Chances are we won't be able to tell you.