I know that quite a few times I have been frustrated due to drawing a card, then thinking the phase has shifted, start tapping mana to cast a spell, only to find that its still the draw phase and the mana wasted. Its been said that there is is no undo option for Wagic for untapping your lands, so I was thinking a better option would be a toggleable option in the options menu "automatically move to main phase after draw." so that those of us who are less then attentive all the time can elect to give up the ability to cast instants after drawing a card in the draw step for the ability to not waste mana unexpectedly, not to mention saving my teeth from wearing down as I grit them in frustration.
Second option is more of a graphic tweak but one I think can really save some memory and speed up viewing of the library. As it is now, the library fetches card images as they rotate, showing 5 on screen at a time. I think it would be better if it used a wheel like diagrammed below to move through the library, as it will only load one card at a time allowing for faster scrolling. Also, It would be helpful if the library was sorted alphabetically if you could use the L and R buttons to skip to the next letter of the alphabet or maybe the left and right directional buttons since the new wheel diagrammed below would use the up and down buttons for movement.

this is a mock up I made in MSpaint. I believe it would be a better system myself and I hope everyone else agrees.
Thank you for listening to my suggestions!
