so how much did ubisoft fuck up with this one ?
Warning: incoming wall of text.
It was developed by Limbic Entertainment, with Julien Pirou from Ubisoft as the creative force behind the project. He's a fan of the M&M series and tried to make the game old-school, using World of Xeen as the main inspiration. The game is turn-based, uses grid movement and you move your entire party together; in other words, a blobber.
The drawbacks are the slow load times, numerous ambush fights, formulaic combat, slow performance issues, the fact that it was designed for 64-bit operating systems, the overworld world map which has a lot of corridors or terrain features you have to walk around, and no auto-walk.
Pirou is a fan of the Wizardry series, so he imported certain elements over, such as direct taunts, melee spells, and tougher and more infrequent battles (rather than many, easier battles from M&M). Also, even though the earlier M&M titles were the main inspiration (3-5 especially), MMX uses a party of four, as in MM 6-9 instead of parties of 6-8 characters like the earlier games. Also, it removed party positioning, which was a feature of the earliest titles. Sceptic wrote
a very good post on why the game falls short in terms of tactics compared to its predecesors. Ironically, MMX doesn't feature some of the best-liked features of the later games, such as the Arcomage mini-game or paper dolls that reflect your characters' current equipment.
MMX does not have the sci-fi elements of the NWC games, and it abandoned the continuity and setting of the previous games. I actually like this fact, as Ubisoft won't touch the legacy (pun intended) of the previous games. Nevertheless, there are many subtle allusions to the previous MM games, which I enjoyed, since it indicated that the developers were fans of the series.
Things I enjoyed (warning: subjective opinions ahead): good variety of classes, grid-movement and turn-based gameplay, puzzles, reasonably large gameworld, challenging combat (aside from ambushes and mana potion chugging), no monsters scaling to the party's level, large number of sidequests, nods to the previous MM games. It reuses assets, like monster and NPC models, from Ubisoft's Heroes 5 and 6, but at least it saved them some money and allows the relaunched MM/HoMM series to have a more consistent look.
In my opinion, the game's biggest achievement is that it exists. I think it is a positive sign that companies are starting to pay attention to niche games and realize there is a section of the market that demands more than console and phone-based action games with "RPG elements". MMX is a labor of love, developed on a shoe-string budget, and I think that the fact that so many people are enjoying it and discussing it in this thread shows that it got at least of the elements of a MM game right.