[Pharo-dev] Do we want AST-Debugger?

Hi. Look at AST-Interpreter project which includes AST-Debugger http://smalltalkhub.com/#!/~Pharo/AST-Interpreter. Code is so simple comparing to "bytecode simulation" approach of current debugger. AST debugger are independent from bytecode set. It just visit AST-nodes to simulate code execution. But current debugger simulates bytecode. It depends on current bytecode set. There are few kinds of BytecodeEncoders. To understand how current debugger is working you need to know many VM details. So my question is why our debuggers are not based on AST interpreter? Why it is bad idea? (if it is bad). Best regards, Denis