Yes, that sys.bin serves as fw_all.bin, the only difference is that it's loaded by the bootloader from the filesystem.
boot.bin is not bootloader, it's ramloader, and "boot.bin" is a misnomer. It's only needed for writing data from RGN or GCD to the flash chip. And after that it disappears. It's not saved anywhere on the device.
I don't think that map update contains GCD file with boot.bin.