VaYigash - Short Thought

In Breishit 45:28 Yaakov says, ""Rav, od Yoseif beni chai." The general explanation (Rashi and others) of this is that Ya'akov is saying that he is very (rav) happy that Yosef is alive. The Tosefet Brachah questions this and suggests something that he hesitantly and humbly suggests may fit better with the text. In 45:26 the brothers tell Yaakov that "Yosef is still alive and he is ruler over all of Egypt." Yaakov's response is that he doesn't need Yosef to be king of Egypt, as it is more than enough for him simply that Yosef is alive!