I have never seen a shop from a previous event being offered again. If they are legally obligated to allow gem buyer's to use their eggs, then surely they could have issued a disclaimer that this was the last time these resources could be used in the new shop. Isn't that what people have bought them for? To be used in the current and following year's shop? Why offer last year's shop? It's an admission that this new shop is terrible compared to last year. So they're just excluding new players.
People are aware of the business plan. We've seen this before with the new battle system back in November. But it doesn't mean we have to accept it. If it had not been for the negative feedback that this community delivered, then I wonder what iteration of the battle system we would have now.