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.
As regards ECUSA's hemorrhage, there may be an element of exit from church life, but my observations (experiences) say that may be a smaller percentage than is apparent. I suspect many arrive at their "destination" in protestant churches rather quiet about their church history, and so it goes unnoticed.
From this blog it seems many aren't arriving in the Continuing churches.