took a bit longer due to issues with the node deployment.
But I added a script execution node to the AF Utilities which hopefully covers at least the basic usecases from the BASH node
I added env-prefs to maybe also cover @mwiegand problem
where you can change or add new enviroment settings used by the node (by default it reads all enviroment settings which are used by default)
But have to say did not use the old bash node at all - so things could still function slightly different…
(also could not test if the node functions correctly with mac os)
But in the long term I think it would be great if the External Tool node just covers all the requirements 
The core is just simple java code with a few lines - so if you want I can also try to provide you with a snippet instead which you can tweak yourself 