Just like the previous series Higurashi Umineko is divided in 8 games called Episodes which are somewhat similar to story arcs in other series (of which 7 are released by now)
Each of those Episodes give you a new variation of the full rundown of how a strange mass murder occurred in the time frame of 2 days on a cut off island. The whos, hows and whys differ greatly but all of them are canon as there is some Groundhog Day style loop going on (similar to Higurashis setup but much more straight forward in explanation about it).
But besides the individual stories which are somewhat self-consistent per game there is also a over-arcing plot advancing though all of the games which makes this into a riddle to find the great master plan behind every little aspect of the individual variations of the story by combining what you know about all of them.
Furthermore the whole series is thematically subdivided in the first 4 games and the second half. The first 4 games are referred to as the "question arcs" because they are meant to provide the whole setup to solve the mystery while the rest is collected as the separate "Chiru" series which tries to slowly reveal all of the core to the mystery (which is why fans label them as the "core arcs"). But thats more of a meta perspective for the whole series.
Individually the story always have a mix of answer and new riddles of all the relevant topics and provide a new challenge. Its just that later on the hints get more potent and/or obvious and the stories stop giving you 2 new confusion facts for every fitting puzzle piece
Besides if its really a deconstruction of mystery novels per se (as you assumed) is hard to say until it has finished but it every so often deconstructions some popular elements of the detective novel history and also goes really meta-fictional about this type of story at times. But those game also make very clear later on that they are meant to be solvable by the readers though reasoning about the provided setup just like traditional mystery tales even if the way to address the mysteries can be highly unconventional.