A suggestion
i think it would be good to develop a new feature-an area that we can travel by ourselves without a dice and encounter different monsters by walking in a particular place (just like similar games-pokemon, etc.) and it would really add support to this game and i think there won't be a player who wouldn't like it.
furthermore, i think you can also add people in those new areas who will give us certain tasks(just like quests in various games) and reward us for completing them(it can be an additional feature to the tasks that are already exist).
in addition, i think that if you add more monsters every week, lets say even 1 monster each week or even 2 it would be great and will keep people busy and make sure they log in every week in order to see what's new.
i know it's very difficult to develop and requires time and creativity but i think it will only benefit you and you should start working on that and it can be done in a month or so..
last but not least, i would really appreciate if someone who is responsible for this game's development will comment or send a message to me so i can know if you're taking this seriously or it was all in vain.
any way, have a nice summer vacation (by the way, you should make an area connected to the summer perhaps the beach and some monsters which fit the theme).