Right clicking error gives you a context menu of Open in Code Editor or Copy Error
Double line errors, path at bottom, more space for error at top. Make the colours less harsh (probs need more tweaking)
https://files.facepunch.com/matt/1b1211b1/sbox_yu3L3pwgEx.png
Get the right line numbers w/ mapped spans, make sure we +1 too
In tools mode don't spam the console log with compile errors