It is pretty hard to do a like-for-like comparison between how the park is operating now and how it would be doing if everything was running normally, but I'd guess that the major coasters are running at no more than 2/3 capacity on average. At one end of the scale you have Rita running almost normally with full trains whilst right next door you have Thirteen running at about 1/3 capacity. It's a similar story elsewhere - Enterprise is basically entirely unaffected (though the throughput is so bad anyway so it doesn't really help the overall park capacity), meanwhile Blade running with only 5 groups per ride cycle. If we assume a 1/3 reduction in ride capacity park-wide, that'd turn a 2021 capacity day into a >20k day. I'd say based on the queue times we've been seeing that guess sounds about right. The only difference is that a 20k day is RARE in normal times - since 2015 it's only really the occasional day in summer and scarefest/fireworks weekends where they get that sort of figure. This year as the park capacity is lower they're far more likely to reach it and the exception has become the norm. To get to a situation where queue times are in-line with people's expectations they'd have to cut capacity quite a bit further, probably to around 10k. That'd be equivalent to a 15k with the rides running to capacity, which pre-2020 would be a busy day but not a horrendously busy one.