I do see the difference, and I think it is for the best, however, as far as modifications and good intentions may go, I believe a completely new one would be needed in order to make a real change. Now, we also have to take style and taste into consideration. The texture is definitely simple, but the models aren't objectively "good" or "bad". I think they just portray a more natural, regular look, in contrast to the more "ripped-cut" style some other works go for. If you can do it, Paul, and you're satisfied with it, I am all for it. You're not the content creator, and it's not your responsibility to upgrade this particular addition. I think what Heka was not so happy about was their inclusion in Project Q. In all honesty, my selection is a mix and match of different hak projects which include at least the previous feet and shins from Q, which were defined, correctly UVMapped, and smaller than other options. I don't remember if the torso was the one created by Ragnarok for his ACP suite, but that's the one I use, the modified version without shoulders. As for limbs, I use... uh... I think his name was Xaltar? This guy who made a rework of anatomies and some heads that are very high quality in my opinion. Finally, I prefer Kuraryu's hands.
See, I wish I could help more, but I am no content creator. I can do basic model and texture modifications, same as most of you guys, which is why I say I don't think a simple texture modification can help definition in the new models. All I can do is share what I've found to work best for me. Oh! Also, If OldTimeRadio is around, he had some neat ideas on fully-skinmeshed anatomies.