7.2 continues piling it on:

-The Underkeep is essentially a combination of Alexandria Castle, which was already seen in the Alexandria dungeon, and the Desert Palace, continuing the trend set up in 7.0. Numerous architectural features, such as the main hall and half-spiral staircase, are ripped right from IX itself. The final boss of the dungeon, Valia Pira, is (visually) identical to the same boss from IX.
-While her name is changed to suit XIV Alexandrian theming, Zelenia (presumibly from "Selenium") is a dead ringer for Beatrix - even as a giant killer robot, her appearance, personality (as remembered by Sphene), rose motif, and battle theme song all make it blindingly obvious.
-Sugar Riot will summon both the Gimme Cat and infamous Yans from IX in her Savage fight as adds.
-Howling Blade's Fenrir-granted abilities being both Wind and Earth based (as opposed to the usual Ice) references how in IX Fenrir used either Earth (in conjunction with Titan) or Wind if you had the right equipment. The face of IX Titan shows up on the pillars he tries to crush you with, and one of his attacks is "Terrestrial Rage," like Fenrir normally uses when summoned in IX. Fenrir's "solo" summon which activates if Eiko is equipped with the Maiden's Prayer, "Millennial Decay," has him split into multiple copies to attack a target - referenced in Howling Blade's overwhelming speed letting him do the same thing. Howling Blade's face while transformed resembles Fenrir's from IX, his Fenrir bits (like the tail) have the white / yellow / blue palette of IX Fenrir, and even ring name pays homage to Fenrir's epithet of "Howling Beast."
-Tomestones of Mathematics gear resembles or is identical to characters and / or NPCs from IX (such as the Tank gear looking suspiciously similar to Steiner's armor, helmet excluded).

So, ah... yeah, I don't think Yoshi-P hates IX if he greenlit all that.