Hi, I try to write there some my ideas, what we can upgrade in this awesome game.
When monsters spawns in zone why don't do some graphic's effects like opening portal from where monster spawn? I understand, that's not very important, but this detail changes reality of game. Spawn monster type can be "from where" mobs spawns. Example, Devil's can open portal from hell, Angels can open portal from heaven or clouds, let's try to imagine, that monster opens portal, dashes screen, and jumps to zone in 1-2s. animation. When he dashes screen, opens portal, we can see some beautiful background or specifical place.
Let players control raid bosses, if players who control raidboss win, he can get rewards from npc or something like that, that's can be more fun than using raid boss AI. To control RB player must have some key, item or pass.
Make more specifical monsters and place balance. Underwater, ruins, vulcano and etc.
Thats it, if I have more ideas, I will post it on this topic. Please give me your opinion on my ideas, ty.