There's a lot money available for Yosemite. Don't know about now, but five years ago (in 2012) they still hadn't spent most of the money that Congress allocated to Yosemite to recover from the 2017 flood. The Park Service right now is working on plans to modernize the Bridalveil Facilities. We also should wait until the Merced River Plan items are fully implemented.
In regards to the lines at the Entrance pay stations, those lines can be more easily reduced by better staffing (so all entrance booths are open to peak hours), the use of express lanes (for those who have already purchases a park pass, and maybe purchasing some land down below in El Portal to relocated the pay stations down there where they could have four entrances booths instead of only two.
A lot of park visitors come from the Bay Area and Los Angeles region, maybe thought to to created a FasTrak lane at the Hwy 120 and Hwy 41 entrances for those who have FasTrak transponders install in their vehicles that will automatically deduct the entrance fee with passing through the pay station.
Leave No Trace