There's been some bosses with the occasional gimmick, I think. The problem is, any decent use of Materia tends to make the party absolutely absurd and able to just outscale bosses way sooner than in games like FFV or FFVI. FFV at least asked for a fair amount of time or grinding to bring out the really broken combos like Rapid Fire + Dual Wield or X-Magic + high level spells, FFVI doesn't really snap in half until you can suddenly slap Ultima on the entire party.Actually…that brings up a good point. Previous games had genuine puzzle bosses. Using Reflect volleyball to deal with the three sisters, fighting a sentient black hole gate thing; they made you think, made you strategize. I think the closest FF7 gets is "don't hit the scorpion tank when it's tail is up" and maybe that Yin-Yang physical/magical split monster.
Meanwhile, FFVII gives you Enemy Skill on your way out of Midgar with super early access to good spells like Beta and Mighty Guard (particularly the latter, which in FFV was exclusive to a rare encounter in World 3 and in FFVI required shenanigans to learn from an enemy with 1 HP that starts battles poisoned). Throw in "oh hey I can just slap summons on literally everyone in the party with little cost" and as Omi has demonstrated, you can slog your way through a lot of the fights with little issue.
Final Fantasy VIII is likely to have a similar problem, if Omi grasps the Junction System quickly... which he probably will with help from the thread. Minimal grinding is required to start abusing abilities like converting cards and items into magic to superbuff your level 10 party into the stratosphere, only made all the worse by the fact that FFVIII has level scaling enemies for you to quickly outpace.