My two main gripes with the current ESS AC implementation is that (if I've understood it) it relies on an active R process (e.g. it won't suggest the name of a

My two main gripes with the current ESS AC implementation is that (if I've understood it) it relies on an active R process (e.g. it won't suggest the name of a function you've just written unless an active REPL has evaluated it), and that it doesn't work at all with pipes, which means it fails for ggplot2 and dplyr style coding (which is really all I write).