Adding "Lightning Bolt" connectors to the standard workflow tools to allow dynamic automation of the settings would be a game changer. I believe that this would enable us to create universally dynamic and adaptive workflows which could be used as drop in solutions for most datasets. This would turn the standard tools into a dynamic ones and dramatically reduce the tool count to accomplish dynamic tasks, and make complex workflows much easier to internalize. Making standard workflow tools more dynamic would allow us to easily dynamically incorporate conditional tests / values / fieldname selections / bypass / etc into tools like detour / filter / formula / unique / transpose / crosstab / summarize / Outputs / etc. I would also like to see the ability to utilize a bool field to bypass any given tool in a workflow. That way we could do things like conditionally bypass an entire formula tool which would dramatically simplify complex formula construction, turn on and off inputs / outputs, simplify error avoidance, etc.
In order to build complex dynamic conditional workflows with the current tool capabilities, most of us are forced to use custom macros (often a multitude of workflow specific ones as well), constantly add and remove formula created fields for message relay, and create complex multi-routings / tests / unions in a standard workflow with large numbers of tools and containers. This hides many of our tasks within short-term use fields / custom macros and it makes the rest of our workflows voluminous and less intuitive.
On the User Interface side, I recommend a simple approach. Next to the standard tool setting there should be a dynamic input option which allows you to select the source field in the lightning bolt connector. Next to that, there should be an icon that can be clicked on to pop up a short text description and a basic screen shot of data in the correct format for dynamic input. I would also like to see a check box at the bottom for manual tool "bypass" which can also be dynamically controlled. (This would especially be helpful on outputs, but it would also be helpful to allow formulas and filters to be kept in place for future use even when they should not currently be used) Turned off tools could be highlighted in a red background or something.
This would be useful for anyone creating dynamic and adaptive workflows, but it would especially expand Alteryx Designer's capability to attract more custom software developers like me. It would dramatically reduce the need for a large number of complex workflow specific macros that clutter our systems. Users that find the traditional workflow tool approach easier for them could easily use the tools as normal by simply using the standard manual settings. Advanced users could simplify the creation of universally dynamic and self adaptive workflows.