What is the significance of the fact that Yakov called the location where he Davened 'Beis-Eil'?
Rashi (Ibid. citing Pesachim, 88a): In connection with the Pasuk in Yeshayah, 2:3, where, in time to come, the nations will refer to the Beis-Hamikdash as 'Beis Elokei Yakov - 'Not like Avraham, who called it a mountain (Bereishis 22:14), and not like Yitzchak, who called it a field (Bereishis 24:63), but like Yakov, who called it 'a house' - Since, initially, going to the House of Hashem was difficult like climbing a mountain, then it becomes easier, like walking through a field, until finally, it felt like going into one's own home - See Oznayim la'Torah, on Pasuk 17, DH 'Ein Zeh ... '.
Why does it say that Yakov called it Beis Kel? It was already called so in the days of Avraham (Bereishis 12:8)!
Sechel Tov (19:19): People used to call it Luz. 1 The Torah called it Beis Kel, for later that would be its name, just like "Sedei ha'Amaleki."
Rashbam: Due to where Yakov slept, they changed the name of the city to Beis Kel.
It says here that Yakov called it Beis Kel. Below (35:6,7) it implies that he called so only when he returned!
Tosfos ha'Shalem (4): Yakov slept outside the city, and called the place Beis Kel. The city was called Luz. Malbim