Something to consider is how this looks to the witnesses.
Dwarves look down on manling magic because it's unreliable. Here, some very senior dwarves watched a wizard cast a spell several hundred times in quick succession in bad conditions without, as far as I can tell, anything going wrong, as the miscasts seem to have been minor enough only to afflict Mathilde in non-obvious ways.
Now, obviously Mathilde isn't considered a manling these days, but it still might have some impact.
While I'm sure they are grateful to be alive I suspect the horror of the experience itself will dominate their recollections. Being dipped in the wind of boundaries and pulled through the space between spaces blind and helpless would be mentally scarring to anyone. Never mind how anathema to the very solid dwarfs image of themselves it would be to be rendered intangible.