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1. Jesus said the New Covenant was an everlasting covenant... why do we need another? I know it rounds out the list at seven covenants... but is there another reason? Can we be any more reconciled with God than belonging to His Holy Family as co-heirs in Christ?

2. This list leaves out the clear covenantal language spoken to Isaac and Jacob. This was reflected in Leviticus 26:42 "And I will remember my covenant, that I made with Jacob, and Isaac, and Abraham. I will remember also the land:"

Why do we need another?

The people agreed to obey God! Remember, a covenant is an "agreement" between two parties ABOUT something. The proposal from God is likened unto a marriage covenant. God said,

"Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt; which my covenant they brake, although I was an husband unto them, saith the LORD" (Jeremiah 31:31, 32).

"For finding fault with them [there was no "fault" or flaw in the covenant itself—the fault was with the rebellious people!], he saith, Behold, the days come, saith the Lord, when I will make a new covenant with the house of Israel and with the house of Judah:

Please read WAS GOD'S LAW IN FORCE BEFORE SINAI?
You'll find the excerpt above, about 3/4 the way down from the beginning of that article.

Also look at the following list of "covenant" from crosswalk.com.