I would suggest we be careful with the term "Anglicanism" here -- because I'm still there, if disconnected from the world-wide Anglican Communion. I think you meant something like "Episcopalianism" (which is still not exactly correct.)
I also wouldn't write off Anglicanism, even in North America, and even in ECUSA, just yet. There is some motion (in true Anglican fashion glacially slow) towards "The Day", as this blog notes.
I would never write off any church, including ECUSA, although it looks pretty grim to me from an Anglo-Catholic perspective, anyway. The only rays of hope in ECUSA seem to be Evangelical, which isn't at all bad -- it just isn't the whole traditional Anglican picture.
Finally, I may be incorrect in my perception that the hemorrhage in ECUSA has been an exit from active church life altogether -- it's just how it seems to me, namely that ECUSA is shrinking at a far larger rate than have former ECUSA members been entering the Continuing Churches, RCism , or Orthodoxy.