Is it ok to copy a W5 head and make it better or are we just mad at Speedmaster

If you are doing a casting that is a complete copy of the W5, down to the logo, sure, you're probably as bad as Speedmaster. But you wouldn't do an exact copy, you'd make changes to the design.
I thought Brett Miller was working on something?

All the Edelbrock head copies started with someone sending a head to Steven Sun @ CFL Engine Parts manufactory Co.,Ltd, or somewhere like it, and asking him to make them. Then they've been purchased by everyone else.