I just started casual recently and I would just like to say that so far my experience has been a good one.
The actual concept of a casual world makes sense for those who only want to spend a few hours or perhaps minutes on tribal wars each day. With the slower speed but increased barbarian growth, I feel that it promotes casual play as players can grow relatively well compared to a normal world, without the need to be farming all day. I am sure some people will say that it only promotes inexperienced players, having these types of settings for this world, but it seems that the whole purpose of this world is to promote active playing, without the need to play excessive for an excessive amount of time. The speed seems spot on, as does the village growth, but I have not encountered the attacking parameters yet, so I cannot judge that in a fair manner.
As far as the variety of players on casual, I think it is fair to say that both experienced and inexperienced players are allowed to play this world without feeling the need to play for a long amount of time. Also, it seems like a less stressful environment to grow, as I feel both ranking and farming are not necessary to grow in this world. It seems to me that removing daily and achievement awards from the hall of fame helps to reduce the competition of growth. Yes, it may be true that a good player can come to this world and play 24/7 to easily go up in rankings, but it seems that the culture of this server has prohibited a large amount of better players trying to join casual just to "pub stomp" everyone else.
To whoever participated in developing this world, I say well done.
Edit:
In regards to the "only positive feedback" that can be posted here, I feel like constructive criticism would do well to perhaps improve game mechanics if need be. That being said, purely negative feedback does not help and should be prohibited, but let's not forget that without set backs there is no improvement.