I tested the DX6.1 audio/video drivers in 95b and also D-tools without the USB supplement.
The DX6.1 drivers are (nearly) as good as the recommended ones. However, this is for running directx games at 640 horizontal resolution (3dfx games are unaffected). At smaller resolutions, the aspect ratio is distorted. With the recommended drivers this is not the case. Perhaps the DX6.1 drivers are better for new users as it is simple to install. Then, the other drivers could be offered as an alternative. For gaming, this should be fine in 95b.
I removed the USB supplement update in 95b and confirmed it is necessary for the installed d-tools; removing it caused an error about the virtual SCSI device. I then reinstalled the USB supplement update, uninstalled/installed d-tools, and then d-tools worked as before. However, it wasn't necessary to reinstall IE4. The "abbreviated d-tools installation" procedure saves the install/uninstall of IE4; however, the USB supplement update (and possibly Installer update) are required for 95b, at least as far as I've tested it. The abbreviated procedure (extracting CABs instead of IE4 install/uninstall) is certainly ideal in creating a minimal image size, but I wonder whether typical users would navigate the added steps.
Edit: I included a 95b installation guide at a web site shown in my signature.