Who cares about cars....this effectively eliminates the park capacity limits in all practical terms. Whatever rides were left with capacity limits should be loaded full now. Also allows for transport to ramp up and pool capacity to be increased for the Summer. Next up....entertainment returns.
Not clear if they will increase pool capacity. They should -- outdoor transmission risk is so low. But they talk about keeping 6' distance where people take off their masks. And they take off their masks in the pools.
Unfortunately, it doesn't resolve the dining capacity issues.
And most critically, still have the significant staffing issues. As I've said many times, I think non-Covid issues will slow down the re-opening. Whether it be Disney re-evaluating offerings like FP, or simply insufficient staff.
Nationwide, we have record job openings:
U.S. job openings soar to record 8.1 million, but businesses can't find enough workers
Businesses have a record 8.1 million jobs to fill. The problem, they say, is getting enough people to fill them.

The issue is supposedly even more acute in Central Florida with restaurants reporting they have had to close some days, limit hours, etc, because they can't find staff.
The last 2-3 years, WDW summers have seen attendance of about 50-60% capacity. So if they increase their capacity limit to 60%, that would be the same as "normal" summer.
They run a risk of taking in too many guests if they can't open up more dining: Major guest satisfaction issues if it's impossible for on-site guests to have a meal apart from a 3-hour wait for a mobile order.