The Erev Pesach Holiday

The Gemarah Arachin (10a) says Pesach does not half full Hallel every day as opposed to Sukkot for on Sukkot there are different korbanot every day as opposed to Pesach. Rav Dovid Solevetchik ask so what, each day is still a מועד so why should it not have Hallel? 

The Rishonim beginning og Makom Shenahagu cite the Yerushalmi that Erev Pesach is assur to do work after midday since the korban Pesach is offered then. In other words, the day one brings a korban is assur to do work (the Rishonim argue is this is a Bibical law or Rabbinic - see Tosfos, Ran etc.) The Rambam Yom Tov (8:17-18) says עֶרֶב הַפֶּסַח אַחַר חֲצוֹת, שֶׁהָעוֹשֶׂה בּוֹ מְלָאכָה אַחַר חֲצוֹת מְנַדִּין אוֹתוֹ, וְאֵין צָרִיךְ לוֹמַר שֶׁמַּכִּין אוֹתוֹ מַכַּת מַרְדּוּת אִם לֹא נִדּוּהוּ. לְפִי שֶׁיּוֹם אַרְבָּעָה עָשָׂר בְּנִיסָן אֵינוֹ כִּשְׁאָר עַרְבֵי יָמִים טוֹבִים, מִפְּנֵי שֶׁיֵּשׁ בּוֹ חֲגִיגָה וּשְׁחִיטַת קָרְבָּן.לְפִיכָךְ יוֹם אַרְבָּעָה עָשָׂר אָסוּר בַּעֲשִׂיַּת מְלָאכָה מִדִּבְרֵי סוֹפְרִים, כְּמוֹ חֻלּוֹ שֶׁל מּוֹעֵד. Why does he compare it to chol hamoed, why is this law in the laws of Yom Tov if it is a korban law? 

Rav Wahrman (Oros Hapesach siman 18) explains :

Erev Pesach itself is a holiday. He says the korban creates the holiday. Rabbi Brown says a similar idea in Moadanay Moshe siman 2; he says the korban is a siman that it is a moad. 

The Rambam Kli Mikdash (6:9-10) says regarding those who donate wood to the mizbaoch that on those days they can't do work but he says this is a minhag. This seems to contradict the aforementioned Rambam that Erev Pesach is an issur because of the korban but as R. Brown explains, according to the above explanation of the Rambam it is not difficult for a regular korban creates an issur of minhag as to keep one's thought occupied with the korban and Erev Pesach is a real issur due to it being a moad. 

What we see is that a chiuv korban can create a form of holiday. The same can be said for the korbanot of the holidays. The korbanot are a siman of the kedusha of the day. Yes, every day of Pesach is a moad, but the fact that the korbanot are the same means that it is all one long holiday. As the Alter Rebbe says (490:6) that all the days of Pesach are secondary to the first day. However, Sukkot which has different korbanot every day is a unique holiday every day.