John 6:29
Young's Literal Translation (YLT)
29Jesus answered and said to them, `This is the work of God, that ye may believe in him whom He did send.'
Therefore Col. 1: 20 does not state that all WILL be saved, but all who believe and only those who hold on to the faith will be saved.
Ok Refute! 
You are right in one respect, Col 1:20 declares the ta panta/ the all will be reconciled.
Reconciled=To cause to be friendly again
To conciliate anew
To bring back into harmony
To cause to no longer be at variance
To bring to acquiescence/ bring to content or quiet submission
To bring to agreement
To call back into fellowship
To adjust the way you think
To adjust/ to settle
To cause to submit
To re-establish a close relationship
To settle/ to harmonize/ to make compatible
To bring together. To conciliate. To re-unite. To adjust. To resign oneself to.
Yes indeed, our God has purposed to reconcile the all/ the ta panta back into Himself!***NOT panta minus ta (nearly all), but ta (the) joined with panta (all.)
Robertson Word Picturesta panta (the all things, the universe) as if the universe were somehow out of harmony reminds us of the mystical passage in Romans 8:19-23. Sin somehow has put the universe out of joint. Christ will set it right. Unto himself (ei auton). -Robertson Word Pictures
Institutional Christianity. The church is his body is addicted to the idea that for things to work out right between us and God, "we have to do our part," and if we do, then "God will do His part." That makes God dependent upon us "getting it right" before He can get on with His purpose and will.
At the heart of our flesh's alienation from God, at the heart of our blindness and ignorance, is the desire to get credited for "holding up our part of the deal." We like the idea of grace, as long as the successful operation of grace is attributable to us "letting God" do what He wants to do.
- John Gavazzoni-
"He is the agent and the goal of all creation. He exists before everything else, and everything else holds together in him. The Church is His Body and He is its Head. He is its beginning for He was the first to return from the dead, which means that there is no part of the universe in which the topmost place is not His, for by God's own decision, God in all His completeness made His home in Him. More, it was God's decision to effect through Him an act of universal reconciliation to Himself of everything in heaven and on earth, and it was through His death on the cross that God did bring the whole universe into a right relationship with Himself.
Once you were estranged from God; your minds were hostile; your conduct was evil, but now the situation has changed. God has changed your enmity into friendship to Himself by the incarnation and death of His Son, and has thus brought you into His own presence, dedicated, innocent and blameless, provided that you remain firmly founded in the faith immoveable in the hope of the gospel which you have heard." -Dr. William Barclay-