Tier 3 markings include both markings applied via applicators bought during events and markings that can only be obtained via breeding NCLs claimed during those events (or by breeding to event studs). Because of how different these two methods are, it doesn't really make sense to lump these markings together and it makes it confusing when trying to evaluate the worth of a lion with a bunch of tier 3 markings, because unless you have them memorized you'll need to check which markings are breed-only and thus valuable, and which are applicator and thus aren't.

It also makes it a pain when planning an heir's design in the lion wardrobe. Even if you try to filter the markings by tier so that you just see the ones that can be applied to an existing lion, there's no way to differentiate between the event markings that you can actually apply to your heir and the ones that you can't.

It'd make more sense to separate the tier 3 markings into something like tier 3 - event applicator and tier 4 - event breed only (renumbering as needed).