I was reading in the Sfas Emes HaGaddah regarding drinking wine during the Seder meal, that he doesn’t like the idea*** because it would interefere with the Mitzvah of Sipur Yetzias Mitzraim, but if one does drink it should be because of the opportunity to say HaTov ViHamaitiv, yet I have never seen anyone make this, I have attended public Sedorim for many years.
He also seems to indicate to be careful that your second cup is completely drained as then you may be mixing not as good wine with your best, not sure about that one.
*** my understanding of the text which is not necessarily correct.