Will be taking Metro line 2 from Shanghai Pudong Airport.

Do I still need to change at Guanglan Road from 4 car to 6 car or is it a through service now? My timings will be around 2 pm from PVG on a Saturday, so what would be the frequency of trains?
Also please advise on single journey ticket, Shanghai Public Transportation card, and Souvenir Ticket. Which serves best if one has to use public transport for the next 2-3 days?