So why the down grade on existing blueprints from the plan moving forward? If you can get 11 restoration spells from a tournament, why only 10 from a blueprint?
You have seriously down graded the value of blueprints for diamond players. Currently a magic residence is 16 squares and a workshop is 24 squares. That averages to 20. But, to be fair, probably the ratio of residences to workshops is 2 or 3 to 1, so using 3:1, that would average to 18 restoration spells per blueprint.
This is a significant downgrade for anyone with magic residences and workshops. I am disappointed at the only 10:1 exchange, it should be 18:1 for fair exchange of what people who purchased magic buildings based on the ability to upgrade with the blue prints. And it should be 11:1 based on what you can get from how you've said the tournament has been changed.
Why set yourself up for a revolt of your cash flow players? That just doesn't seem wise.
So....
How about bringing on an 11th and 12th chest for the tournament and up the competition? Put 3 and 3 restorations spells into those chests... bring it on. Say and extra 11k and 14k for those chests and add a full 25k to the tournament... Maybe even a lucky 13 chest for even a another 25k... But that one should get 5 restoration spells.