Not sure that workbench library should be relocated as well as having AGA stuff on an A3000.
Something funny here.
Uncommon, yes, but funny, not really.
Space is very tight in this particular ROM version, due to the updated FastFileSystem and scsi.device drivers being in there, among others. These drivers take up more space than the original versions, and as little as that might appear to add, it won't allow for all compontents to fit. Dropping workbench.library out is the straightforward solution to this problem. Commodore did the same with the A4000T ROM due to space constraints.
The AA graphics.library variant has a fall-back for ECS/OCS and won't blow up on the A3000. The only drawback I can see in the use of this graphics.library variant is that it takes up more space than the ECS version.