Err... let me quote the relevant part of the links you provided:It doesn't need DX12. Lets look at what they recommend for PCs.
Diablo 4 ****Predicted**** Minimum System Requirements
- CPU: Intel Core i3-560 3.3GHz / AMD Phenom II X4 805
- RAM: 4 GB
- HDD: 60 GB of storage space
- GPU: NVIDIA GeForce GTX 1050 Ti 4GB / AMD Radeon R9 380X
- OS: 64-bit Windows 7, Windows 8, Windows 10
- DirectX: Version 11
- Screen Resolution: 720p
Diablo 4 ****Predicted**** Minimum System Requirements
- CPU: Intel Core i5-9500 3.0GHz / AMD Ryzen 5 2500X 3.6GHz
- RAM: 8 GB
- HDD: 60 GB of storage space
- GPU: NVIDIA GeForce GTX 1070 / AMD Radeon RX Vega 56 8GB or
- OS: 64-bit Windows 7, Windows 8, Windows 10
- DirectX: Version 11
- Screen Resolution: 1080p
- Network: Broadband Internet Connection
Minimum Requirements - ****Predicted****
- OS: Windows 10 64-bit
- Processor: Intel Core i3-9100 4-Core 3.6GHz / AMD Ryzen 3 2300X 4-Core 3.5GHz
- Graphics: AMD Radeon R9 380X or NVIDIA GeForce GTX 1050 Ti 4GB
- RAM: 8 GB
- HDD: 55 GB
- DirectX 11 Compatible Graphics Card
So random websites make up some specs, back in November 2019 and we take it as a given?Recommended Requirements - ****Predicted****
- OS: Windows 10 64-bit
- Processor: Intel Core i5-9500 6-Core 3.0GHz / AMD Ryzen 5 2500X 4-Core 3.6GHz
- Graphics: AMD Radeon RX Vega 56 8GB or NVIDIA GeForce GTX 1070
- RAM: 16 GB
- HDD: 55 GB
- DirectX 11 Compatible Graphics Card
We don't really know if it requires DX12 and at what tier, I'd assume it would as D2R requires it as well. But time will tell. If it has a fallback layer with DX11, then I don't see a problem. Use Crossover as it is and enjoy.