PAL's New Booking Class

What's with the new booking class. Former booking class used to be limited to "Econolight, Fiesta Class, Mabuhay Class". Now we have Fiesta Deal, Fiesta, Saver and Fiesta Plus for Economy and Mabuhay Classic and Mabuhay Premium. The online booking isn't so convenient either. Example: If I want to check if there are available Fiesta Deal Seat and Fiesta Saver Seat. I have to click Fiesta deal then they will show you seats on Fiesta Deal. You have to run another search if you wish to see Fiesta Saver Seat. I wish they could do what Singapore Airlines do. I click then they gave you the prices for different booking class. Very convenient. Anyway, for now let's see whatever PAL has instore.