The doctrine of "election" is not a new doctrine as God has chosen certain people since creation. Just a few examples.
Isaiah 41:8,9 "But you, O Isreal, my servant, Jacob, whom i have chosen, your descendants of Abraham, my friend, i took you from the ends of the earth, from its farthest corners i called you. I said "you are my servant; i have chosen you and have not rejected you" God chose Isreal.
Psalm 33:12 "Blessed is the nation whose God is the Lord, the people He chose for His inheritance." Again isreal was chosen by God.
In the New testament we find God choosing also.
Matt 22:14 "For many are invited, but few are chosen." God chooses whom He saves
John 15:19 "if you belonged to the world, it would love you as its own. As it is, you do not belong to the world, but i have chose you out of the world." Jesus, showing His divinity, shows that He (God) has chosen us to be His.
1 Peter 2:9 "But you are a chosen people, a royal priesthood, a holy nation, a people belonging to God, that you may declare the praises of Him who called you out of darkness into His wonderful light." This verse show again that those in Christ are chosen by God.
Some will call this "pick and choose" but it isnt as i have only written part of Scripture. To understand these passages read the whole passage before and after to understand the context. If i were to write it all out it would be quite a long post lol.
My main point would be that if we can accept Isreal as being "Gods chosen people" then why cant we believe that even now God still chooses? Did Gods Sovereignty change between the OT and NT? Are we willing to allow God to choose or "elect" in history but not in the present? This is not a question of "free will" "election" or what ever you want to add but a question of "who is Sovereign, us or God?" The "top two" doctrines within reformed theology are the authority of Scripture and the Sovereignty of God. To understand just about everything within Scriptute i believe we must first understand the Sovereignty of God as best we can thru the Word of God by the understanding of the Holy Spirit, not our own understanding.
For all of us in Christ our personal statement of faith should begin with two words "Jesus first".