Right, dispensationalists have managed to talk themselves out of the 10 commandments all because of the fourth commandment. They aren’t fooling anyone.
Rather, you can only imagine :
That the sabbaton was not included in the list of typological commands for which literal observance is not enjoined under the New Covenant.
That keeping the 4th commandment was repeated/reiterated to the NT church under under the New Covenant as was the other 9.
That the sabbaton was recorded as the only specific day that the Lord and church met together, rather than the first day.
Classing the 4th commandment as part of the typological commands, including the everlasting covenant of circumcision, means that idolatry, profanity, dishonoring parents, murder, stealing, adultery, and covetousness are rejected as part of the binding obedience of faith (http://peacebyjesus.net/rc-stats_vs._evang.html).
That because some liberals do so means that all who hold literal observance of the sabbath to be abrogated must also do so. That SDA sabbath worshipers are not being fooled.
The End.