Swipe bigger card deck It like "draw card: result on specific poker color": You chooce bigger card deck(discard pile or drawing pile) and swipe it and show 1st card. Then apllies effect/trigger up to poker color: ... .
This litte difference, becasue all cards stay in that pile, none is discard like by "draw card".
New drawing deck and discard pile. This is focus on many expansion created by any player. Those have added many playing cards. So I advice to make 2 drawing and 2 discarding pile. One pair(drawing and discarding) for all cards from bacis BANG. Another pair for new one. This mechanic is way to keep percentage ob bacis card with possible adding new cards to bang. I seem little problem with placing on discard pile(Choose correct one) - can be solved by symbols on right top corner of card that add to any expansion. Solution is simple- players look on symbol on right corne before it place on discard pile. If none, place it on basic discard pile, otherwise another pile. It should work. Before each game, you just decide with card will be added to next drawing card. (I keep any possible of modification by players)
It was like basic game. In phase 1, you draw 2 cards regardless from 1st or 2nd drawing pile.(both from 1st or both from 2nd or per one from both).
When you place card to discard pile, you place it on 1st that is from basic game or on 2nd otherwise.
When you should draw card, you can choose any drawing pile.