I'd be happy as hell if ANY new OS looked/worked like DOS! Assuming of course memory management was fixed, large disk support, and it ran in 32 bit protected mode.
Three small core files that make up the OS? A directory of supporting commands? Hell yeah! Add a multitasking, multithreading, memory protected, 32bit GUI and you'd have a proper operating environment.
Yes, the combination of MS-DOS and Windows 3.x was poor at best. However, if steps were taken to fix those problems, rather than combining them into a single OS and/or removing DOS completely, we might have gotten somewhere in the PC realm.
Yes, I used DesqView... I WAS a BBS SysOp, after all.