1. When placing a breakpoint, indicate whether the breakpoint will work. Obviously when you execute the script you see whether you have incorrectly placed it on a line that is not executable - but perhaps considering flagging these in advance to save time.
2. The breakpoints summary has a nice link feature back to the line that has it applied. Very helpful for large scripts. Can the same be added to the variable display ? Whilst the variable name could potentially have multiple declarations the link could take you at least back to the first one ?