What I think would be beneficial to everyone is that the 1 star items the starter pack and the party pack include would be taken from them since they are more or less "uniquely useless". Include rare unique helm and armor costumes instead.

Tier-2 is already easy to achieve so 2 star items within starter pack would make the respective run unbalanced and unequal to other players who have insufficient funds. Yet with costumes they would be useful to make you more recognized although they don't change your status in any way. No restrictions here to make them usable by everyone. Starter pack could include the choice to choose your favorite colour from the variety of five colours, green, red, yellow, blue and purple. Party pack could include the same choice of colours for each knight who is given a pack as a gift. These colours would still be influenced by your main colour to make them even more diverse.

Costume shields is also a very good suggestion, but I think I'd be more impressed to have just more diverse variety of shields and shield colours. Make the shields diverse in forms instead and not recognizable by colours. This in my opinion would make the game totally more diverse than with the solutions having colour as a main diversifying attribute with just a small form diversity.

Best of Day! O(^_^)O

Heart pendant trinkets would be nice :). The pendants may be useful for t1 players.