For a long time I have been a little frustrated by the way in which Premium Creatures work, and the power they give to the players that have the money to buy them.
It is not difficult to see that those who have the money will be able to have more powerful creatures, and thus more powerful rituals. While the Shop claims that it is for personalizing only, this is not true.
The worst case of this, in my opinion, is the Rustgold Drachorn, which one can buy for 51 dollars. In case you were wondering, it would take a player 255 days to gain enough credits through free credits to get that. (5 days for 1 credit, 51 credits). The Rustold Drachorn gives a route around actually gaining a Drachorn through roleplay and SmartAlekRJ, and actually undercuts the rarity and ability to moderate who can get a Drachorn.
In simple words, those with money have better creatures than those without.
The solution I believe would be to make all the premium creatures similar to the Pimped Grasan, that is you must have the original creature before you can get the premium version, with the exception of the Joker.
And, like a mutated drachorn, the upgraded creature would start from Level 1 no matter what the level of the original creature was.
I think this would make things far more fair, and more towards the idea of having the Shop a place for customization and not advantages.
If you would like to take it one step further, and make the premium upgrades truly just customization, you could take away all the bonus stats and vitality that the premium creatures have. Although, I think this is unlikely because there has to be some incentive for buying the creatures for the fighters that care little about looks.
Awi