But it is still the basic idea behind it (isn't it?) Would it be possible to make such a big progress without the initial original DPOS  invention? Why do you named it then DPOS anyway when it is so different?
Using only the name(DPOS) should give you enough intensives to give credit to the initial creator and supporters... Not? Or at least you should not give a misleading(?) name that "help"(?) to bring you traffic from other community's that appreciate the DPOS technology. I suggest you strongly to think about it twice. It really doesn't seem to me a fair approach from your part and definitely it will hurt your project at some degree... (for example I would personally invest heavily on the project if I had not currently negative feelings regarding this issue...)