Recent reviews by Disc Lord

An acceptable, but flawed release. I really feel it deserves a thumb in the middle.
I've been a fairly avid player of the original PSP Project DIVA games, F and F 2nd on the PS3, and Project Mirai on the 3DS, so my experience comes from the console side of the series. I'm not a prodigious player by any means, but I could clear extreme difficulty with perfects on a lot of songs in those games. Hundreds of hours between them all.

The Good:
-Nearly every song from the aforementioned games in one place on the PC! (minus Project DIVA X because screw you if you liked that game, I guess)
-60fps visuals with two aesthetic style choices (MegaMix's cartoony visuals vs. Future Tone's more doll-like models).
-A lot of customization, overall. Being able to select preferred glyphs for different controller types is appreciated. I think all of the character modules are here.
-Doesn't require a terribly high-end PC.

Here's where things go a little south:
You're bound to hit performance issues even on high-end systems. I believe the anti-cheat or DRM is to blame for this. We're talking little frame drops to outright lockouts that will ruin your run and make the timing feel all over the place. You can't have that in a rhythm game and it's a shame Sega goofed this up so bad. Once the game has been loaded for a while and you don't have anything running in the background, it generally becomes tolerable.

My subjective analysis:
Since I'm a fanboy of the original console games, which is where the series originated, there's something very different about this one when it comes to gameplay and presentation. This more or less comes down to the fact that Mega Mix+ is like a port of a port. And the source? Project DIVA Arcade (Arcade Future Tone, more specifically).
As the name would imply, DIVA Arcade is an actual arcade game with a different controller layout (a horizontal row of the four PS-style buttons vs. a d-pad layout). It had unique patterns and a ribbon controller for the added slide mechanic. The whole deal was ported to the PS4 (taking advantage of the DS4's touchpad) and then ported to the Switch with a new look. The PC version is sort of an amalgamation of those two releases and has the most content.

Because of this lineage, the UX is designed for quick action right into the rhythm game with few frills. Extra touches of the console games (fanart on loading screens, light dating sim, etc.) that pulled from the Vocaloid community are gone and that sentiment is represented in the songs alone. Newer songs added to the ports have done away with the original 3D AMVs that are core to the series with full motion video. Think Nico Nico Douga-style amateur AMVs of varying quality. I get that the "community" appeal has seemed to move in this direction, but it was certainly done to keep budget in check and feels as such. In my opinion, those songs deserve an original 3D AMV since they managed to graduate to one of the highest achievements of a Vocaloid producer; getting into Project DIVA.

Gameplay itself is where I have the greatest struggles. These games still use the arcade patterns and mechanics, which are NOT designed and optimized for conventional controller use, making the difficulty curve quite steep, especially when it comes pulling off combos (visual hints disappear on extreme difficulty). There exist home versions of the arcade-style controller, but they are very expensive. You might think I need to get gud and switch to the keyboard, but it's not the same thing (especially the slide). I find that the hard difficulty is fairly boring and extreme to be too much. Since most of my muscle memory has been put in on a PlayStation-style controller, this game has thus far been the least-satisfying when coupled with the often wonky performance. I think it will fill in a niche for the hardcore arcade players (with their expensive controllers), but I find this game to be a fairly intimidating entry point.

Worth getting on sale, but it doesn't scratch that same Miku itch I had for the console originals.

The sheer amount of content in this game is almost unfathomable and it's all great. Only purchase if you like spending a lot of time on one thing. Not "just a Minecraft clone".