I assumed previously, it all had to come via Rotterdam/Amsterdam so the EU Mafia got their cut.
As far as I know it was all road haulage via Spain
Current journey time 6 days, they are claiming 3 days for direct ferry.
In the road haulage game time is money. This is the polar opposite of the Irish landbridge problem where the direct ferry routes from Ireland to europe are longer.
Will all depend on numbers (it always does) but on face value you are accessing a cheaper, higher quality product in half the time it currently takes.
Would need to know the ferry costs to give you a better idea on the financial benefits to it.