Cup Of Kiddush II

This post is an addendum to the post from last year 'The Cup Of Kiddush' where it was explained why the Magen Avraham assumes that the first of the four cups assumes the status of the 4 cups and therefore can't be recited before the time for the Haggadah and therefore kiddush can only be said after nightfall. However, why would the Magen Avraham not explain that one must wait for nightfall in order to fulfill קידוש במקום סעודה since one can't eat until nightfall as the Taz does? The assertion of the Taz is that in order to be קבמ"ס it has to be the timeframe to eat seudas Shabbos. However, this is not agreed upon. The Maharal Gevurot (Ch. 48) holds that to fulfill seudas Shabbos the meal must be eater into the night even though he allows one to say kiddush before nightfall. It is clear he holds one can say kiddush, eat the meal (even though it does not count for seudas Shabbos) and then eat bread after nightfall. (The Taz (291:6) holds one can fulfill seudas Shabbos before nightfall.) Clearly, he holds even though it is too early to fulfill seudas Shabbos, it does not mean one can't fulfill קבמ"ס. This would indicate the Mahara"l holds קבמ"ס is not a דין in seudah for one can eat a meal to occupy accompany the kiddush even though it is not a "seudas Shabbos." This is the opinion of the M.A. as well for he writes in 267:1 in the name of the Shl"a like the Mahara"l that one must eat bread after nightfall to fulfill seudas Shabbos. Hence, he can't say like the Taz that it won't be קבמ"ס if one can't eat the meal yet, for it is no different that saying kiddush before nightfall every Shabbos. (The Taz might mean that on Pesach night one can't eat anything at all and hence it is not קבמ"ס as opposed to when it is just to early to fulfill seudas Shabbos but one can eat Though in theory one may be able to have a bit of mezonos, וצ"ע.)