If you can achieve what the client needs purely in flash then fine - why not?
Like someone already said: "Director is a whole different league. it performs scripting tasks hundreds of times faster than flash, and can do pretty much anything you can imagine to a computer given the right xtras (from copying files from a cd direct onto the hard drive to printing documents that aren't displayed on screen all the way through to controlling robots and dvd players etc.) If you're moving into cdrom creation, it's definitely worth investing in Director."
Out of interest, I do all my cds using both flash and Director together, because they can happily talk to each other and have distinctly separate roles
Flash is a great tool to create nice and funky stuff for the WEB, with MX even a bit more! Director is more a powerful development tool for creating Offline Multimedia applications. If you want to compare Director to an app so compare it with Revolution or Real Basic. For instance: can you explain me how I develop an offline application with an offline database but NO ODBC connection with flash?
However, did I misunderstood it? In that "thinksecret" article that they say we have to wait for another 8 month? At this moment I dont care about new features. The only thing I need is Director for OS X (Director 8.5.1.X). If they want to charge me in the next 6 month for an upgrade to Direcor MX with all the new features - fine I going to pay. But for now I need that X release, even if its a Beta...
Cheers
Michael