One of the things that keeps people interested and playing your game is the comradery they have with their allies against their opponents.
So ... WHY do you delete comments on the alliance chat channel so quickly, often before many allies (who may be in other time zones) have even had chance to see the comment !?!?
I've noticed that comments on the Alliance chat channel last longer when 2 or more people have contributed, but if there is no response to a comment in an hour or so, then the comment disappears, and is never seen by all allies. Why not modify the alliance chat channel to hold at least the last 10 comments indefinately, so the conversation doesn't die prematurely, but then lose old comments once theyve been outdated by new comments. Theres nothing worse than an Alliance chat channel that appears dead and empty, when actually it may just have been a couple of hours since someone commented, or posted a battle report etc.
This would improve comradery, and player longevity, as new players often quit if they dont get any feedback from allies.