MODIFIED MILK INGREDIENTS, SUGAR, WATER, GLUCOSE, COCONUT OIL, NATURAL VANILLA FLAVOUR, MONO AND DIGLYCERIDES, VEGETABLE GUMS (GUAR, CAROB BEAN), CARRAGEENAN, NATURAL COLOUR.
Haagen-Dazs Vanilla
ingredients: cream, skim milk, cane sugar, egg yolks, vanilla extract.
Mono- and diglycerides of fatty acids: https://en.wikipedia.org/wiki/Mono-_and_diglycerides_of_fatt...
Seems like this replaces hydrogenated oils across a whole range of products, and I'm suspicious that it's just a way to avoid public concerns about hydrogenated oils by replacing them with something similar just without the same stigma.
Quick search found this article, which states some more specific concerns, if in a rather extreme way: https://foodbabe.com/2015/07/31/theres-no-safe-level-ingredi... (but of course you can search and find similar concerns about many things, doesn't make them true).
So the issue is that the monoglycerides and diglycerides might be constructed with trans-fatty acids, and the label won't let you know.
But given that this is an ingredient behind vanilla you're not looking at very large amounts in the first place.
I wouldn't really consider anything in there to be a filler, it's just favoring sugars over fats.
And that ingredient list is still pretty small. 9 vs. 5 when you combine the two sugar entries.