I think it would be better if the updates of the different tiers were at different times. When a pokemon drops down to UU from OU, the tier updates between UU and NU shouldn't be done at the same time. The same applies if a pokemon drops down from ubers, the pokemon shouldn't drop down to UU at the same time. Or move up.
The reason for this is that new, powerful pokemon included in a tier will likely cause big changes. Let's say a pokemon drops down to UU. This pokemon causes some NU pokemon to get used a lot more, and makes UU pokemon useless. This will make the tiers outdated after maybe just a week.
The tiers are supposed to show which pokemon are more used than others. They are based on useage. But useage may change really fast after tier changes. The tiers will really quickly stop showing which pokemon that are more used than others. They will be outdated, because they show that a pokemon is much used when it isn't.
My suggestion is to make tier changes happen later for every tier below. When the bottom of OU is updated, so pokemon move up and down from UU, pokemon should not move up and down between UU and NU at the same time. If the changes between UU and NU happened a month later, the new UU list would better show which pokemon that are the most used, because many of the changes that the drop-downs from OU causes would happen in that month. Maybe it should be given as much as two months. That will make the tiers show better which pokemon that are much used and little used in UU.
The reason for this is that new, powerful pokemon included in a tier will likely cause big changes. Let's say a pokemon drops down to UU. This pokemon causes some NU pokemon to get used a lot more, and makes UU pokemon useless. This will make the tiers outdated after maybe just a week.
The tiers are supposed to show which pokemon are more used than others. They are based on useage. But useage may change really fast after tier changes. The tiers will really quickly stop showing which pokemon that are more used than others. They will be outdated, because they show that a pokemon is much used when it isn't.
My suggestion is to make tier changes happen later for every tier below. When the bottom of OU is updated, so pokemon move up and down from UU, pokemon should not move up and down between UU and NU at the same time. If the changes between UU and NU happened a month later, the new UU list would better show which pokemon that are the most used, because many of the changes that the drop-downs from OU causes would happen in that month. Maybe it should be given as much as two months. That will make the tiers show better which pokemon that are much used and little used in UU.