Well, it's more of a vision than specific wishes. A general direction to go in. But, for example, this:
"You have also the Java line that is indicated in the log so you can find it in the generated source and, as Erel is a clever guy, he added the corresponding B4A line as a comment just above the Java line so you know where the exception happened. What is missing exactly?"
So, the line in B4X that corresponds to the Java error is known. Why not show it in the message?
Sure, I can dig around and find it, but time spent digging is time not spent being productive.
I know that error messages (regardless of dev tool) is frequently wrong or misleading. That's normal. Still, where possible, they could be made better.