1. Yes, some sloppiness here.
2. Self addressed transactions are not a problem ... they just equate to a no-op. Ofc, there is the potential for an attacker to flood the system with self-addressed transactions or zero-valued transactions. This edge case should be handled.

 The negative -1 transaction you showed is the one that caused a faulty tx of sz 2^64 that I ignored during the fork. The ledger was never updated but the block was not rejected so it was a bug :/

3.  Yeah, I agree it doesn't make that much sense. It can easily be set to anything anyone wants. The nonce parameter and blockID was removed after the fork but I left timestamp in. It's a wasted space :|

4. I think I used this or something similar to get Monero first time.

5. I am still not sure if I really want to mess with it. I think the cleanest solution is just to mint an additional 6.6M coins and leave it at that.

6.   I agree though that if the coin gains value (which we all hope it does) ... then it will be important for those with large holdings such as early miners to remain anonymous lest they become targets for attackers.