That's because there are a lot of mages working on the Veil currently. And as they work on it, you have MORE work to do to return it to normal.

In the old Veil - if they gave 20 legendary items to couriers, a Rager could thicken it back with 1.

Now you need to put in some effort more proportional to theirs. Two big items won't be enough if they did a lot more than 2 big items to thin it.

Otherwise the veil *DOES* regress towards a more normal base. BUT the base can also be edited to be higher or lower by circumstances.

If Ragers are currently not around a lot, that is going to make your job harder. BUT if you focus a lot towards thickening, you can offset those pesky Magi.

As a data note - it has been this THICK before too (where mages were having a harder time thinning it) - it's just that the shoe is on the other foot currently.