Semi-agree and semi-disagree.I don't think Ocarina of Time, gameplay-wise, is really all that influential. It had a full 3D environment and sometimes you could ride a horse if you wanted, but those are the two biggest things. A Link to the Past is much more influential to the entire franchise in regards to overall gameplay. Even the plot points about the sages and Ganon as a person originated in Link to the Past.
A Link to the Past is indeed what set the standard of what we think of as a "Zelda" game, but Ocarina of Time is what set the standard for the longest time of what a 3D Zelda is.
Ocarina of Time was pretty clearly a huge influence on the series after that point until Breath of The Wild totally shook things up again.