Even with an 8 hour day you can / should be able to, still work in all the attractions. But you need to, as stated above, target those majorly attractive rides early on, trying to get them out of your way early before lines build. That type of planning has always been your best bet for attacking the parks even before Covid. Wait times have been varied and in some cases listed higher than actual times... lines have been stretching out very far due to distancing, so it can be confusing finding where the end of the line begins. Capacity numbers are reported on various sites as guesses because actual numbers arent given out. Parks may look and feel emptier than usual, but then youll run into groups of people. Most reports from people whove gone have been positive. There are guests saying the mask wearing, dealing with mobile ordering, having less entertainment and park experiences, and such has taken away their enjoyment as compared to a normal WDW visit. You have to decide if the new covid restrictive Disney can deliver enough enjoyment for you and be worth the cost.