Hebrews 1:2
"in these last days has spoken to us in His Son, whom He appointed heir of all things, through whom also He made the world."
Does Hebrews 1:2 wrongly place us in the last days?
Recognizing that the Olivet Discourse found significant fulfillment in 70 AD, many such references can be understood in the context of the end of the Old Covenant age.
"Last days" -- but of what? Most likely the "last days" of the age of the law, ushering in the age of the Messiah. This fits in of course with Hebrews' theme of the superiority of the new covenant.
Does Jesus being an 'heir' imply God is dead or incapacitated?
It is objected that one cannot be an "heir" until someone dies or is incapacitated, which therefore indicates that God is said here to be dead or incapacitated. The objection fails to realize that in this societal context, one could pass on an inheritance well before death and irregardless of it. Remember the parable of the prodigal son.