1) Easier browsing format so all card abilities and information can be obtained (would be nice to have a graphical display where you can hover over and see card facts and what pack they are from without having to load up seperate windows via alteil.com.
2) Display of how complete your personal collection is, at present it seems there isnt a figure to show how complete your collection is in total, only for individual expansions.
3) Perhaps a display of how many total cards from each Sphere, with a percentage to show how lawtia you are, (a bit of an alignment system for players perhaps based on their collections)
As a collector i spend money on the game because i enjoy the hobby of collecting the cards, and its through gran purchasing that the game survives so free people can enjoy it and so the game can expand in total, plus such a checklist could promote people to become collectors and increase the revenue the game generates, hopefully leading to lower gran per card prices and more diversity in card files (a checklist would also allow people to quickly check card statistics and plan combinations etc)
Also as one final point, its hard to be a collector when some cards are limited edition only, it would be nice to at least have the opportunity to gain these missing EX cards via the lottery system or perhaps as tournament prizes. Otherwise the game does become a bit biased as to "who got here first and managed to get that copy of EX: primrose so they can primclone" wheras future players wont be able to get those cards.. Ever. Which i think is a bit upsetting especially considering the cost of the cards.
Thanks!
Omen



