Adding Tournaments to PTGO is a great idea. I have played MTGO for years and for the last 4-5 years haven't spent a dime in game as I draft a lot and use my winnings to allow me to keep playing.
Hopefully TPCi can integrate online tournaments with Championship points, akin to the MTG PTQs. If you have an online tournament schedule that closely mirrors that of physical game, it would give players more of a chance to qualify for Worlds.
I haven't played on PTGO since the update that included X and Y. I think that particular update was a nightmare. The way the card images are handled now really irritates me and is the biggest reason I haven't played online in a while. That said, if tournaments are up and running, I may just have to play through my irritation and get a deck thrown together.