Found the review thanks to Retromags. It got docked for funny reasons. Apparently it got nailed for having a sappy story not written for an American audience (not sure if this is a complaint on the translation or something else...) and the animations are weak and and animation sequences (cutscenes) are too long. One part of the games coverage actually said VI was more of an interactive movie than a game.

Here's the review:

It's the biggest RPG of all-time with so much story and variations of play that fans may become lost in the world for months at a time, so make sure to stock up chow before plugging in the game. The story mixes fantasy and technology like all Final Fantasy stories but much of the added punch comes from the greatly improved graphics and sound. Parties of up to four must foil the Empire---Not a particulary inventive plot--- but there are countless twists and turns along the way. Another major bonus for RPG fanatics are the many side trips that can be taken. Many of these sequences won't help you win the game directly, but they expand the play and the world to a whole new dimension. Due to the size of this monster Pak, Power is dedicating three in-depth reviews plus a Player's Guide available separately at your video game retailer for the best coverage anywhere.

+: A big game that will take at least 100 hours to complete. Battery backed-up memory with three slots. Lots to see and do.

-: Story is often sappy --- not written for an American audience. Animations are weak and animated sequences take too long.

Graphics and Sound: 3.9
Play Control: 3.1
Challenge: 3.9
Theme and Fun: 4.0
Oddly enough, its has the highest average of all the games reviewed in the issue except for Super Punch Out! which looks to be the highest rated game that month.