I suppose you make a remarkable illustration of how people with no cosmic ambitions and brainwashed by the self-help industry, don't even have any goals in life that require direct brain editing, and aren't much willing to imagine them because it implies that their own brains are (gasp!) inadequate.

Wow, somebody's cranky today. (I could equally note that you're an illustration of what happens when people try to build a technical solution to a human problem... while largely ignoring the human side of the problem.)

Solving cooler technical problems or having more brain horsepower sure would be nice. But as I already know from personal experience, just being smarter than other people doesn't help, if it just means you execute your biases and misconceptions with greater speed and an increased illusion of certainty.

Hence, I consider the sort of self-modification that removes biases, misconceptions, and motivated reasoning to be both vastly more important and incredibly more urgent than the sort that would let me think faster, while retaining the exact same blindspots.

But if you insist on hacking brain hardware directly or in emulation, please do start with debugging support: the ability to see in real-time what belief structures are being engaged in reaching a decision or conclusion, with nice tracing readouts of all their backing assumptions. That would be really, really useful, even if you never made any modifications outside the ones that would take place by merely observing the debugger output.

Wow what hubris the "brain is inadequate spaghetti code". Tell me have you ever actually studied neuroscience? Where do you think modern science came from? This inadequate spaghetti code has given us the computer, modern physics and plenty of other things. For being inadequate spaghetti code (this is really a misnomer because we don't actually understand the brain well enough to make that judgement) it does pretty well.

If the brain is as bad as you make it out to be then I challenge you to make a better one. In fact I challenge you to make a computer capable of as many operations as the brain running on as little power as the brain does. If you can't do better then you are no better then the people who go around bashing General Relativity without being able to propose something better.