I think it's a good idea. After all, the villagers aren't just arbitrarily grouped into tiers. The thread objectively looks at the popularity of the villagers. It doesn't prescribe popularity; it describes popularity. It is for this reason that villagers change position in the tiers all the time.
The villagers in the higher tiers cost more because they are more popular. The popularity thread didn't make them cost more, and it didn't make lower tier villagers hard to find. If a villager is in a lower tier (especially tier 5), they will be hard to find for the simple reason that not many people are looking for that villager. Many Cycling Towns will void a villager if no one lurks for it. If a certain villager receives no lurkers from multiple CT's {and is rarely mentioned in the Looking For thread}, they're more likely to be put in a lower tier.
The villagers in the higher tiers cost more because they are more popular. The popularity thread didn't make them cost more, and it didn't make lower tier villagers hard to find. If a villager is in a lower tier (especially tier 5), they will be hard to find for the simple reason that not many people are looking for that villager. Many Cycling Towns will void a villager if no one lurks for it. If a certain villager receives no lurkers from multiple CT's {and is rarely mentioned in the Looking For thread}, they're more likely to be put in a lower tier.