well for DX range we dont really have a 85mm( in full frame format) which is not available in any 3rd party or nikkor lens. other than that i think they cover most DX range
I know they are not equivalents, but we already have:
The 40mm DX macro lens
4 different 50mm FX primes lens
4 different 85mm FX primes lens
1 85mm DX macro lens
I wonder if a 60mm f/1.4 makes business sense?