This is too strong and unequivocal a statement to be brushed off by assuming Esav did not realize it at the time. The reader is expected to bring to the text his understanding of such a universal reality, that caring sons are aware of such situations. That this information was placed immediately prior to the narrative of the blessings is extremely significant. Eventually, Esav did marry a wife from Yishmael that he thought would be pleasing to his father. That verse describes the beginning of a process which brought Esav to an important realization - that an appropriate wife was inextricably linked with the blessing.
Murder is never an appropriate response to deception.
That he would await his father's death does perhaps show superficial filial respect but it also is explainable on other grounds. One who murders his brother while his father is alive is often, at the least, disinherited by his father and banned from family and estate and with the bereaved father around there is more possibility of judicial retribution. Esav's resolution indicates his intention that immediately upon his father's death he would kill his brother, even during the days of mourning, dishonoring both his father's bier and his obvious wishes. Although not explicitly stated, such an entourage is rarely thought of as a friendly gesture. The name change to Yisrael confirms his worthiness.