I am really surprised almost all of the sanji fan i meet hate sanpudding as couple . I too wish this too happen though i dont understand how this op pairing works .
I agree they could make a nice couple. And they have again interesting story together. Sa hi remember pudding but we don't know how much she erased from his memory. The next time they will meet will be interesting with the difference of memories.
Pudding will still be relevant again : three eye tribe, maybe with BM pirates at Elbaf or others plots.
And her " bad" side is nice enough.
But I still prefer that Sanji ends up with nami. Love that pair