I have things I like and one major thing I dislike about tiers:
Likes:
1: Encourages members to learn real moves
2: It is set up in a way that is easy to learn off of previous knowledge
3: Promotes members to come together and help each other with their techniques
Dislike:
Has no way of reciprocating the effort it takes to learnt he techniques, so in other words, there is no motivation to participate in the system.
If we can find some way to motivate members to enter into tiers, that would be great, but I think we are limited in that aspect. We may replace the tiers system, but I would really like to keep the Knowledge Base, because it is a great source of information for any aikido player.