Hey there! Welcome to Lemmy, and thanks for trying Liftoff!
Some context: Liftoff is a FOSS revival of a previously abandoned Lemmy app. Because of this we got a lot of great things already completed, but also some pain points like the one you mentioned above. One of the main focuses of the original was to provide a tailored experience for people with multiple accounts accross multiple instances. We've come a long way in 2 weeks but we're still in beta testing and there will be bugs and user experience issues that we're working on.
To your points:
- Right now search or hyperlinks from posts are the only way to discover communities but we're working on a community discovery tool.
- In order to provide an experience for people who don't know Lemmy we add Lemmy.world as a default instance. That can be deleted from the account settings by pressing and holding on Lemmy.world.
- Currently if the links to communities aren't formatted with the /c/ notation, there is a bug where the email app gets opened. The fix for this is in progress and should be in the next release.
- You can't currently rehide NSFW posts but that's good idea for us to implement.
- About the saved posts I agree this is hard to find and something we're wanting to tweak. If you have multiple accounts across multiple instances then you have different saved posts depending on the account. That's why it currently found on the account page.
Thanks for trying the app and stay tuned as we're fixing bugs and adding features daily!