"Changing dark energy" is just one more leap down the rabbit hole of adding unexplained forces and materials to make the theory calculations match the observations where the known physics do not provide any way to make a match.
Science does have a history of making advances in knowledge by observing such mismatches and using them to look into something more closely, leading to the discovery of "new" physical laws. Special Relativity is a prime example of a successful theory that resulted that way.
On the other hand, when the same theory has come to the point that it is dependent on 20 times more mass and energy than we can detect or explain, and we still need to add the assumption that the unknown energy behaves in different manners at different times, science also has a history of that being a serious red flag that the theory is not correct.
So, I do applaud the theorists who are trying to think outside of "the box" that the Lambda-Cold-Dark-Matter model of cosmology has become.
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