There is a difference Merlin today is not the same Merlin.The problem there, though, is that the last time a significant amount of people voted with their feet in 2015, Merlin only doubled down further on the bad stuff.
Admittedly, it might be different now Merlin are both private and under different management, but the substantial attendance decline in 2015 only led to an accelerated timetable of cuts, so I wouldn’t be so sure that reduced attendance will necessarily lead to a positive change in direction.
Merlin Tussards were the ones that were back then they are now different with Merlin Lego.
So it may take some time but more investments may come