In a strange way, it shows the health of Mangler. I actually think we have more people now than a few months ago.
Some of us even prefer the later expansions (my favs are TSS/SOD/HOT), and Gates of Discord isn't the great filter that it was originally. Even if people don't care for a particular expansion, they know that in a few weeks they'll be on to something different.
I am sure that there are quite a few people like myself who rolled up on mangler for the TSS through UF/HoT cycle.