When the insert function panel(fx) is active it would be nice if the selection list would auto scroll to user typed letter. In other words make it work like excel does. For example if I type 's' than I would like to see all the functions that start with 's'.

would also be nice to present a "most recently used" list of functions.

SMath Studio will include autocompletion ability for functions and variables, like IntelliSense, if you know. Will be available soon.