That new 12News logo would be great if this was 1986. The lack of spacing between the circle 12 and the N bothers me, and the typeface used for the NEWS part leaves a lot to be desired. The 2 is overstretched. Honestly this is a huge downgrade. Don't knock the logo it replaced, the red crescent 12 was actually very decent.
Also that set is terrible, that feels like it should be a temp set.
The fact that only three other former MG stations/sister stations still use their crescent logos (WMBB, WBTW, and WJBF) doesn't mean that KWCH's logo made them look like a Nexstar station.
Honestly, Gray probably left it up to the station since they had used their old MG logo for so long and it had become an identifying mark for them they decided to keep it. Now, it seems they're looking for a refresh to something else.
There's three existing former MG stations with crescent logos still, WMBB, WBTW, and WJBF. Those three stations still have their crescent logos likely because, just like KWCH, it became their most identifiable logo mark, and if it ain't broken don't fix it.