Please make it visible if fields & parameters have members with aliases.
Because field & parameter member aliases are not recognized in calculated fields
It is a flag that keeps dashboard authors aware of potential issues
It reduces number of errors in dashboards
It reduces time spent debugging
It educates [hints] users about issues related to member aliases
The asterisk symbol is already in use for Has Alias and thus also good to use as field & parameter indicator:
The indicator should also be seen in Describe Field and Edit Data Source window as suggested here.
Some warning should be seen in the calculated field editor as suggested here.
Quick overview on/off button that emphasizes aliases in use in canvas, filters, etc.
2015-02-26 Parameters and alias
2014-10-21 Inherit aliases through calculated fields
2012-04-05 MID() Bug