For issues you find with the Switch and Console releases, please follow this link and give as much detail as possible. This is the speediest way to get info to Pipeworks and get a hotfix in the works.
For issues you find with the Mobile 1.3 update, please follow this link and give as much detail as possible. This is the speediest way to get info to DR Studios to look at your issue. Also, some troubleshooting hints here.
that i could see as a problem for a lot of people, but i still won't worry till it's actually in effect, as of right now we have no idea if it'll actually even happen and it usually ends up not happening when things like this come up
it's not a world wide issue, an american government organization can't change laws of other countries or make them pay a fee for anything when the law that they change in their country doesn't apply to other countries, if this is wrong then it'll still probably just blow over like everything...
SC is mostly for the challenge, though the items might still be a bit eh at times the armor is now suited for all classes, calamity will eventually have a final boss (yharim) and after him the super bosses (which there will be more of) come after as an additional challenge