When I was a very young boy attending prayer meetings and feeling it a matter of pride to believe in the Lord Jesus Christ and stand for Him, a simple question from a traditional Christian brother, "What was the need for Jesus Christ to die for us?", did not receive a convincing answer from me when I just said "Because He loved us", even though the love of God was the main driving force for Him to give Himself for us, much more was in the mind of God when He chose to die for us.
"For where a testament is, there must also of necessity be the death of the testator. For a testament is of force after men are dead: otherwise it is of no strength at all while the testator liveth." Hebrews 9:16-17 (NKJV)
The testament mentioned above also means a will which is effectual after the death of the person who prepared it, then all the assets, property and blessedness belongs to them who are mentioned as the beneficiaries in the will.
Christ initiated the will and died for us, we are now inheritors of all the blessedness from God, we have the responsibility to use this blessed life from God for Him. Christ rose again and is alive with us, to help us live this life for Him always.
Here's also how Paul identifies us...
" and if children, then heirs—heirs of God and joint heirs with Christ, if indeed we suffer with Him, that we may also be glorified together." Romans 8:17 (NKJV)
God sees us no longer as children's who can be excused and need not be responsible, rather God has entrusted us with His blessedness and that is a great responsibility as much as it is a blessing.
Thus the death of Christ blessed us, gave us a new life and a new opportunity to live this new life responsibly for God.