1. This is a partially fixed bug. Please submit a bug report.
2. Try <CTRL>+<SHIFT>+C. Or maybe you mean identifier completion: <CTRL>+<SPACE>. See also
http://lazarus-ccr.sourceforge.net/index.php?wiki=LazarusIdeTools3. The debugging functionality is not complete, indeed. Some work needs to be done.
4. Please submit a bug report.
5. Could you send a mail about this to the lazarus mailing list. IIRC, it is not trivial what appropiate anchor values are. BTW lazarus has a more general resizing mechanism, although not completely implemented yet (I think). That might conflict with your ideas. So a discussion might be usefull.
6. I am not sure how to react to this. I think submitting a bug report is best ATM. Lazarus developers can decide what to do with it. Don't expect it to be implemented soon, but it might end up in the Roadmap and at least it won't be forgotten.