Hello! We agree that endgame is massively important and I’m happy to clarify:
Will [Monolith of Fate] be like maps in PoE?
That is a very apt comparison! It won't be exactly like maps, but the Monolith system does take heavy inspiration from not only that system but also Diablo 3's Greater Rifts, Bloodborne's Chalice Dungeons, and more! The main focus of the Monolith content will be heavy randomization but we also intend to mix in a variety of short questlines that will be completable within certain Monolith zones to help flesh out the alternate timelines they illustrate. With this system, we will be able to guide players through zones and stories that they would not have been able to see during the main campaign in addition to more traditional randomized content.
Is [Gates of Memorium] some kind of acts like in PoE (previous versions)? I mean the same 3 acts but more difficult (Normal, Cruel, Merciless).
The Gate of Memorium bears a faint resemblance to these type of difficulty systems but it is far more oriented to endgame. Your first pass through the main campaign will give you full access to the endgame systems, no replays required! The Gates of Memorium will allow you to tackle the locations from the endgame which will be scaled to your level, this will give the player a more deterministic option for endgame farming. If a player favors a certain area's aesthetics or is on the hunt for a drop from a particular enemy, they will be able to farm these areas without a loss to progression.
I hope this answered your questions! If you have any others feel free to ask!