"And Yaakov called to his sons and said, 'Gather, and I will tell you what will happen to you in the end of days.'
In the name of the Baal Shem Tov:
'What will happen' comes by way of chance - that each and every person will be sitting in their work, distracted, and suddenly Mashiach will come." (Yalkut Moshe, Parashat Vayechi)
sefaria.org.il
Why did Yaakov cross his hands? He could have just as easily had the two sons switch sides, and yet, for some reason, he opted to cross his arms.
The Noam Elimelch explains that while Yaakov Avinu felt compelled to place Efraim before Menashe, he also tried to avoid making a big deal out of it so as not to offend Menashe. Yaakov Avinu praised Menashe and added that Efraim would be even greater. While at times some of us are more right or better than some others among us, we must always bear in mind that all of Bnei-Yisroel are great by virtue of the fact that they are Jews. We must find the positive in every Jew.
Outorah.org