I personally think that CE prices will level out pretty soon, at least, I hope they will. If they don't, I hope the developers will do something about an in game materials market for players. Because, basically - new players will be looking to buy CE for the crowns they make in T1 runs. Assuming the game has a healthy number of new players, that's going to be a big chunk of the market and every time you exceed that affordability, the demand for energy at that price drops. Players may not quit over it, but as long as they log out for the day, that's still a decrease in demand. So if the price doesn't level out soon, that means even new players are selling T1 materials for the extra to be able to keep playing. If selling materials is necessary, well... yech. I don't want to be part of a haven that has ten times more sales-chat-spam than we already have. Just create another market interface similar to the CE market but with many rows showing only the single best offer on each material and save the game from inane chat! (Actually, this should be done even if the game is still manageable on pure crowns, just to reduce said inane chat even at its current levels)
Ah, also... if T3 pays worse than T2, that needs to be fixed. Rewards should certainly go up with difficulty. If it's just less profitable because people respawn a lot, well, that's a different case. Nobody said you had to -win- those rewards every time!