Most people liked the old tickets because you could get into the park for a very small price and just visit and not go on any rides or only go on a few. So, for example you could get into WDW in 1971 with no tickets and pay 3.75 just to get in. Maybe about 20.00 in today's dollars. That was why a lot of people were sad when then went away, as you could control how many rides you wanted to go on, or people who just wanted to come in and soak up the atmosphere or hit a few shops or restaurants couldn't unless they paid for rides. In the early 80s when then came in with passports, it was a value as you could go on any ride for maybe 15.00 which is may be 40.00 in today's money.
I am guessing Disney isn't going to be so magnanimous to let people into the parks for 20.00 and buy individual tickets. I am guessing they will charge over a 100.00 and then only allow you to go on a few rides and have to pay more to go on more.