Why did Lavan not hug and kiss Yakov (like he did when Yakov arrived in Charan)?
Oznayim la'Torah #1: It demonstrates Lavan's true feelings towards Yakov, in spite of the covenant that he just made with him.
Oznayim la'Torah: One can say in jest that this time he had no reason to believe that Yakov was carrying jewels in his pocket or in his mouth. 1
Why does the Torah see fit to inform us that Lavan blessed his grandsons and daughters?
Seforno: Chazal said (Megilah 15a) "Do not take the B'rachah of a Hedyot 1 (an ordinary person) lightly." The B'rachah of a father, who blesses with all his heart 2 is even more potent and is bound to take effect. 3
Why does the Torah not tell us the contents of this B'rachah like it did the B'rachah that he gave his sister Rivkah (in Chayei Sarah, 24:60)?
Oznayim la'Torah (citing the Midrash Rabah): Because it was given when he was downcast and in a bad mood - due to his failed mission, and he said it but did not mean it. 1
Why does the Torah record that Lavan returned to his place?
Tosfos ha'Shalem (2): He returned to his poverty. The night that he pursued Yakov, robbers took everything of Lavan's.
Oznayim la'Torah (citing Midrash Yelamdeinu): Before Yakov arrived in Charan, Lavan was merely a mmber of the family of Nachor, the pride of the town; when Yakov arrived, he personally became its magnificance, its spleandor and its glory. Now that Yakov had left, he returned to his former status.