This right here is why it is "more" that you pay for the service you are getting from the shop. Now expect this service to cost a "little" more. Just like the submission prices are increasing, so will the bottom line for the shops to continue submitting.
You may gripe when you go to the store to buy milk, but you still buy it. Most Dealers will likely do the same here and just pass the added cost on as part of the inflation from the increased fees.
It really isn't that 1) complex or 2) harsh a cost.
I was not a fan of losing the discount from the premium membership, but it is what it is. I will still submit things as I see fit under either the standard or premium. I have also submitted through my LCS and had absolutely no problem paying their premium, because it was far less a hassle for me in the long run.
** I will add that lack of notice at all is pretty concerning, communication is key here. It should have been messaged out to the dealers in some fashion, even if it was a short notice like the upcoming price increases**