I have to take Ephesians 2 in light of what the rest of the Bible says about the Law including what the apostle Paul says about it. Paul does not support the idea that the Law was ever abolished and indeed if it was it draws into question the purpose of the Cross for if I abolish the law, there is no more sin, and consequently no need to atone for that which does not exist.
I think the Amplified version of the bible helps clarify the meaning of Eph 2:15.
By abolishing in His [own crucified] flesh the enmity [caused by] the Law with its decrees and ordinances [which He annulled]; that He from the two might create in Himself one new man [one new quality of humanity out of the two], so making peace.
So, the word "abolish" here is translated from the Greek word katargēsas, which basically means to make things stop or take away all its power. Paul's point is that the Law had done its job. He's cool with the law in other places (Romans 7:12; 1 Timothy 1:8), but here he's saying it doesn't keep Jews and Gentiles apart anymore. Now, believers should be all about shared salvation in Jesus, making us one big family.
Instead of the old beef between Jews and Gentiles, God's idea with the gospel is a family that's all about Christ, not rules, but rooted in salvation. And guess what? The outcome is "peace." Paul starts, highlights, and ends his letter with peace (Ephesians 1:2, 2:14, 15, 17, 4:3, 6:15, 6:23). Peace is his deal here. Peace between Jews and Gentiles, especially in a city that's had its fair share of wars. Everyone's after peace, and Paul says you find it in the one Lord Jesus Christ and not the law.