Jesus did fulfill (complete) the law, in our place, because we could never do that. Now that the requirements of the law have been fully meant (satisfied) in Jesus, we are fully restored to the position previously held by Adam before the first sin. FULLY RESTORED! Why would the Son of God come for less!
Jesus own words says He did NOT come to Abolish the Law. How much plainer does He have to make it?
Mat 5: 18 For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.
You're on very shakey ground.
Immediately after Jesus says: 19 Whosoever therefore shall break one of these least commandments,
and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven.
Maybe I'm misunderstanding something, but it seems to me you're advocating that we don't have to keep the law, which is what Jesus precisely warned against.