It has nothing to do with being too tall. She's just not a loli nor really looks like one, especially in the context of the game and its art style anyway.
Then again I've seen people re-define terms on their own in other threads so eh. Someone legit told me being flat automatically makes them a loli. So they could be a flat 10 foot tall old lady with bulging muscles and it'd be a loli I guess.
There seems to be a trend (at least on on Twitter) of trying to lump characters that aren't lolis into being lolis, or maybe it's that people don't know what a loli is anymore.
A bit of a rant: One that annoys me is when they consider a character like Hestia (doesn't even remotely look like one) as being a loli simply because a character (Loki I believe) made a "joke" (friendly jab, trying to piss her off a bit) about her being a loli. I took this joke to be about her being the "youngest" goddess, the most recent to descend, not that she was literally a loli, and not to mention the simple fact that someone thinking you are a thing doesn't actually mean you are one.
You should be viewing characters as if they were people (and people can have opinions and be wrong about them), that you are looking into their world, and not just as a series of overly literal bulletpoints being read to you (You know, fucking immerse yourself).