The thing is it's not just a rompler, in fact its mostly not a rompler at all.
If you look at the 9 engines:
EP-1, CX-3, MS20-EX, PolysixEX, AL-1, MOD-7 and STR1 do not use samples.
HD-1 is a classic rompler, and SGX-1 does use samples so maybe it could be called a rompler, but only in the same way that any of the piano libs in Kontakt.
If Korg just released a synth with the MOD-7 in I think it would be a great synth, people don't see this in the Kronos though as they see a workstation/rompler.
I got the Kronos because it is an amazing synth, not because it is a workstation.