THe orginal D2 pack was done by a few old timers now, P81, Cleeve, Atra, and a host of others. If you are only Interested in updating the basic looks there are plenty of retextured versions out there. Where the OP+ mod went for maximum different ships so you knew what they had from a distance I would choose fewwer models and vary the textures to make the ship more approp for the role it was to fill.
If you want High end but not to high impact on your system look at WZs' current works. I think you will find most of what you need from him or any particular ship you need ask in this forum.
What you are asking for I don't think will happen mainly because the team it took to create the D2 mod some 9 months to do was quite large. Frankly there are not that many of us around here anymore, most have moved onto other games but exporting to SFCOP was always easy to do so we have been lucky that they have allowed us to convert them or they did it for us.
I think the best thing to do is work out what models are out there that you like, the fewer the better, and see if you can get the ones not close enough in looks that you want redone.