My 2cents, the block is convenient, but mostly for things like putting the pin into the gas block/tube. Or disassembling the bolt head. If I was to remove 1 item off the workbench, it would be that.
I can't even tell you how concerned I am for this poor receiver set... ;-) I've seen some.. less than stellar, installation jobs done. Some of the proper tools are just you know.. a good, proper even, idea.