I watch it. I've probably watched 10 or so games this year, and I'll watch the Grand Final on Friday night.
Coverage hasn't disappeared, TSN2 only has rights to half of the finals series matches. I think that the AFL keeps the rest for their online PPV service. They have aired these games in the finals series:
Fri 9/3, 5:30am – Geelong Cats vs. St. Kilda
Sat 9/4 5:00am – Collingwood vs. Western Bulldogs
Fri 9/10, 5:30am – Geelong Cats vs. Freemantle
Fri 9/17, 5:30am - Collingwood vs. Geelong Cats
Before that they aired one game a week. Up until August these games were usually 7's Sunday Footy (Sat. night at midnight ET here), but in the final month of the regular season they aired mostly Friday Night Footy (Friday morning here).
TSN2 will have live HD coverage of the Grand Final next Friday night at 11:30pm ET.