Something I find myself doing a lot is writing the function call first then I want to introduce a variable to capture the return value. However I either need to hover over the function to see the type of the return variable or use alt-g to go to the definition so I can copy and paste the type.
What I'd love is an 'introduce return variable' where you select the function call then VA will prompt for the variable name and introduce it with the correct type (or optionally with 'auto')
// declaration of function we're going to call
std::vector<SomethingLong> doSomething()
// type this:
doSomething()
// now open VA menu and choose 'introduce return variable':
std::vector<SomethingLong> var=doSomething()