That is indeed an anomaly. The lowest allowable climb thrust is above the thrust we regularly use for takeoff. In any case you can always select a higher climb thrust as Denti's airline appears to be doing.
Years ago my company insisted that we increase take off thrust N1 if necessary so as to ensure that it was not below climb thrust. This was fairly rare. When we introduced the EFB it became a regular occurrence and the company line was that as we were reducing noise at takeoff we were still quieter than we would have been.
However it would interest me to know what line Ryanair, Norwegian and other big 737 players are using.
There is plenty of interest in continuous decent approaches (CDA) as noise abatement and cost saving go hand in hand. But using most of the runway and then selecting a higher thrust setting lower down over people close to the airport seems to have escaped notice.