The only time I had a problem with a HD > 4GB was down to an OS3.9 rom update being replaced with one from 3.5 (as indicated by the filesystem resource version) which was readily fixed. Not sure what happened there but I had been tinkering and may have overwritten it, thus a clear case of PEBCAK.
However, I think that it might be handy for people that are returning to the scene after years away, or people that are new to it all. My first suggestion would be to make a downloadable archive that can be extracted to a floppy and if there is enough demand for it then go that way.
Incidentally, if you aren't using SCSI on your Blizzard (assuming it has it) then you are a very silly person. Like me

10MB/s DMA-based disk transfer is nice to have...