dunno, my feelings regarding MOF are really mixed. there are some things that i loved of the game, but the game does have it faults, mostly on the gameplay side (which usually are the most severe faults a game can have).
i'm kinda sad though that 80% of it's bashing feels like biased stuff regarding non important things.
pros: the game visually is astounding and pretty, there was a lot of effort and fresh ideas thrown into the castle, along more classic ones. and the 3d gimmick is masterfully implemented to the point that i can barely think playing the game non 3d (unlike games like fire emblem awakening in which the 3d was nice, but superflous. the game is still amazing though.) the castle feels deep, alive, (even if it had like only 3 types of monsters). and i often found myself stopping just to see the landscape.
musically i think that the game made an improvement from LOS since there were more memorable tunes, some that lingered in your head. BUUT, the way how music is designed to fit in the game sucks hard time, changing battle themes (that IMO arent aruajo strenght) just for one enemy that dies faster than you can say hello really kills the ambient the game was being able to create.
regarding plataforming, it felt a little less scripted than in LOS, and varies enough for not turning too boring, even if more enemies and battle during plataforming would help improve it a lot, outside some shy attempts.
QTE are another mixed bag, having one to open doors and chest is frankly moronic, plus isnt nice to press b repeteadly on a ds. but i enjoyed the lord daemon battle whit trevor, which was one giant QTE. since it felt dynamic, and helped bring variety regarding the other bosses. (plus flying trough the castle on 3d.. should be a disney amusement ride XD).
combat is another mixed bag, the localized attacks are good, but the area attack were kinda OP and once you started abusing them you could easily drain teh challange. the sub weapons and magic modes felt good enough. and i felt myslef often having to drop combos (although a little less than in LOS whose combat was better) in order to dodge, which kinda brings variety... i mean if you wanted to "survive", which brings me to MOF worse point, the death system.
MOF death system is simply atrocius, barely a penalty for dying, means that you dont mind getting hit, and therefore it greatly flattens both the plataforming and the combat. lots of times i found that i t was easy dying on purpose on a trap to "gain health" than to try to survive. whie its nice that they liked to put themselves apart from other metroidvanias omiting the save points, i believe that save points would have greatly benefit MOF. both in making parts of the castle more special and in bringing tension to both plataforming and combat. it suffers from the prince of persia case, a beatiful game ruined by draining the challange in completing the levels, making that you only want to continue playing for looking at more "pretties" instead of because you are having fun.
The story also is narrated in an awkward pace and it kinda disturbed me than they wanted to explain everything except the ending, which imo it should be inverse. and the 100% didnt felt much like one. still, i've never played castlevanias for the plot anyway so not a big deal, glad that the budget in making great cutscenes went to another parts of the game, and kept the cutscenes simple though, lip synch is overrated.
and my final issue was with barrels, i felt that they choosed boring barrels instead of candles only because they would make "more sense" in a realism context (which is also way overrated that everything in games have to make sense in a realism context, dont confuse with coherence which is always nice)... only to put inside perfectly cooked turkey that made even less sense than being in walls or candles.
(oh, and i kinda missed the good voice acting).
still, if you like to play castlevania for "the pretties" which i believe is the reason from a good ammount of metroidvania fans, (a little of myself included). mirror of fate is friggin pretty, there is no deny on that.
off topic: that MOF needed more rpg elements? really? IMO excess of rpg elements is what killed the metroidvanias. OoE was a step in the right direction there greatly reducing all that stuff and making leveling up less important, in fact once i unlocked lvl 1 hard mode and decent gear, ive never went back : D.