I think every block in these extensions can be found in or easily reproduced with blocks in other extensions. And not only are these extensions not useful, they’re kind of annoying. I’m looking for a block, and I get the extensions, the block isn’t in there, and now I just have an extra extension I didn’t need.
Edit: There are some original blocks. The Utilities extension has the newline character block, and Lily’s Toolbox has the Alert, Prompt, and Confirm blocks, as well as the ‘open link [] in new tab’ and ‘redirect to link []’ blocks and (again) the newline character block. I think that’s it, though.