I hear what you are saying and in one sense you certainly could be correct. However with Emmanuel you have a very positive name, "God with us" of an always very positive person whose name in the gospels, Jesus, also has a very positive meaning: "Jehovah with us". With Jacob, his original name matched his character and his history: Jacob = supplanter. That related specifically to his tricky even underhanded nature in obtaining the birthright and the blessing from the firstborn [Esau], his brother. His new name, Israel [God prevails] was given to him when God had begun to prevail in his life, but he was still deathly afraid of his brother, Esau. God had not yet prevailed as much as He would before the end. To me that has meaning for God also had a hand not only in the events written but in the way the original writers wrote it all down or the way a translator translated. God probably has more messages in the scriptures than any of will be able obtain and understand completely. If, however, we continued to guided by the Holy Spirit, may we not be led to even more than we might have expected?
There are certainly names that I have tried to research but never found an underlying meaning that connected to the history of its owner, but that does not mean that all of them were like that. I do ultimately try to leave the final rendering or understanding given in the hands of God.
Give God the glory!