Ok, bean reading somewhat more, and yea, it looks more of the same. Probably one of the most mehh mini expansions so far. They are adding more maps, but that is not exactly new content, just as all other maps, its a reused one. They are making more a linear progression with maps, and you can add more mods to them thanks to atlas, but again nothing major different. There will be new farming areas for specific items with new base mods, but again, nothing huge that we already didn't have in some of different leagues, and this can also be a problem playing the same maps to get this drops. The only thing I like is the new currency to increase the level of the map, but knowing GGG and their drop rates, it will be hard to get and will not impact the game in any meaningful way.
The new league is just same as any other, again random special mobs like in talisman/perandus that you kill to get a new crafting item, that is nothing special, and again gamble. And the ones that are interesting will probably again be very hard to get They should have focused on improving the master crafting, than adding more option to gamble and crap to fill inventory .
I am guessing they couldnt do anything interesting this time, because they are focusing on act 5, and will probably wait for it release to go back to the game again. Even though i didnt like the labyrinth part of last mini expansion, as I hate the trap and more arcade style of gameplay and the need to to it 4 times for every character to unlock the classes fully, at least that addition was really new content, with new area, new boss with interesting mechanic and most importantly the new classes.