It's a very soft no - get it if you want to tool around with the new case mechanics in this one, but if you have to budget your game purchases this DLC would be one of the first I'd cut.
Things I liked (and a reason for you to get the DLC if it piques your interest)
This DLC introduces seeing parts of the scenes at different points of the day/night leading up to and after the grisly death... It could be argued that makes it easier to deduce events, but honestly I thought this was a strong way of expanding on the world in the story and provide context for clues later in the timeline... or earlier in the timeline. I enjoyed this extra dimension to the cases.
This DLC also featured a tab for names we already knew from previous cases, which I personally liked after finding myself going 'yes, i KNOW who this is-' in the base game a few times lol. I also appreciated the tab that expanded a puzzle section instead of cramming it all into one busy place. (At this point, I'll mention I was not playing the redux version).
I enjoyed the translation puzzle, and particularly i liked the conclusion of the second case
The rest:
With the disclaimer that I played through this late at night in sort of a marathon with the base game and other DLC, I found the later solve screens to have a high enough number of blank spaces to interfere in determining which part of the solution it's asking for. Grain of salt here where I should have probably just taken a break and come back to it fresh, but it sucked a bit of the fun out of finding all the clues on the way through.
A problem I particularly have with the last case is I feel like there wasn't enough build up throughout it to properly host the story it wanted to tell. It could have benefited from being split in half, I think, even as just a case and loose end-tying epilogue like in the base game, or having more clue screens to show that story progression. A problem I have overall with the DLC is, much like the Spider of Lanka, that it wants to explain things that don't really need expanding on after the base game, and kind of weakens the mystery and inferences from it. Falls into some of the same pitfalls of clunky and a little too directly phrased dialogue clues from the other DLC.
Puzzle wise, there are leaps that, while I was able to make without hints and can see the logic in them, felt like there could have been clearer groundwork in previous cases for it... but, then again, I might just need to replay with what I know now in mind, and I'll see what I missed.
Overall, kinda scratches the Case of the Golden Idol itch, but the last case kind of fell flat for me; if you can catch a sale on the DLC and might as well pick it up as part of the bundle, but I wouldn't go out of my way for it.