I believe he means that to him, the method of visualising the deck is excessive: he doesn't need an elaborate table with each card in his deck is clearly visible on-screen in a nice tidy, rarity-separated fashion.
He doesn't really care that much about seeing the entire contents of his deck, instead he wants to see as many cards from the card pool as possible. The problem is, the idea "if I could see every available card in a table below" won't work since there's a lot of cards to choose from and they would never fit a single screen
If you have some concrete layout proposal, feel free to submit it. Until then, the best you can do is use the filtering system to skip cards you're not interested in.