Oh god.
Alright let me begin by first saying I'm a long time fan of the original series. I am absolutely baffled as to how they go this so so so so wrong.
It is one things to try and breath new life into a franchise like the Lost Canvas series. It is another thing entirely to do a reboot without any reason to actually do a reboot.
By god the animation is awful, like painfully bad. Some cg animes you can get over it, like for Knigths of Sidonia, but for this anime it is nearly impossible to take you eyes away from how stiff and just weirdly everything moves. Some of the still shots are very detailed and look quite nice, but if your still shots are the highlights of your animation work something has gone wrong.
The plot, is basically a shorterned version of the original anime. The orginal anime was bloodier, and every fight the saints are always close to death. This anime felt a lot softer, like the stakes were not as high. Also some of the changes they made to the plot are very contradicting to a lot of the originals story and character arcs. I feel like they were thinking these changes would make the story feel fresh, but they really didn't accomplish that and instead they took away characters key motivations that drove them in the original series.
All in all I think this reboot failed to capture the spirit of the original, and did not do enough to be able to stand on its own. I hope they leave it at the 12 episode mark they have set out to do, and do not go anywhere near the hades chapters.