It leaves in the D3D9 backend (the master branch removed it because its existence prevented tonnes of accuracy fixes) and tries to incorporate any changes made to Dolphin that aren't incompatible with D3D9. D3D9 was the fastest backend and didn't have the same shadercache issues. You might find everything's horribly broken in that branch, but it might be a nicer experience overall, depending on how you define nicer.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT