I would say so. Of course then there's the debate as to which day of the week that is. But I'd say it is good to offer a day specifically to the Lord.

I think so, not because of works, but to bring joy to Yeshua's heart. If God was going to change a commandment, He would make a new one. Just my opinion.

We should. Amusingly do most so-called "christians" even know which day that is? Most of the ones i run into still think it's Sunday...

however on that note, the Jewish take on "keeping Sabbath" was a bit flawed as corrected by the Word of God:

Matthew 12 New American Standard Bible (NASB)

Sabbath Questions

12 At that [a]time Jesus went through the grainfields on the Sabbath, and His disciples became hungry and began to pick the heads of grain and eat. 2 But when the Pharisees saw this, they said to Him, “Look, Your disciples do what is not lawful to do on a Sabbath.” 3 But He said to them, “Have you not read what David did when he became hungry, he and his companions, 4 how he entered the house of God, and they ate the [b]consecrated bread, which was not lawful for him to eat nor for those with him, but for the priests alone? 5 Or have you not read in the Law, that on the Sabbath the priests in the temple [c]break the Sabbath and are innocent? 6 But I say to you that something greater than the temple is here. 7 But if you had known what this [d]means, ‘I desire [e]compassion, and not a sacrifice,’ you would not have condemned the innocent.

Lord of the Sabbath

8 For the Son of Man is Lord of the Sabbath.”

9 Departing from there, He went into their synagogue. 10 And a man was there whose hand was withered. And they questioned [f]Jesus, asking, “Is it lawful to heal on the Sabbath?”—so that they might accuse Him. 11 And He said to them, “What man [g]is there among you who [h]has a sheep, and if it falls into a pit on the Sabbath, will he not take hold of it and lift it out? 12 How much more valuable then is a man than a sheep! So then, it is lawful to do [i]good on the Sabbath.” 13 Then He *said to the man, “Stretch out your hand!” He stretched it out, and it was restored to [j]normal, like the other. 14 But the Pharisees went out and [k]conspired against Him, as to how they might destroy Him.