In my opinion, there are much smarter ways to combat bots.

1. Battle bots with bots. The developers of this game have to be smart enough to flag someone's account as a bot user. Soooo, everyone has gone to websites that require you to click on something to confirm that you are not a bot. Send those out suspect accounts. Make them appear on the screen in different locations each time, with different puzzles. Get creative here guys.
2. Require each account to have a separate e-mail address (I assume this is so). Again, on suspected accounts require them to have to enter a code from the e-mail. Again, get creative in how to find the code in each email.
3. Always be one step ahead of them. Change things on them constantly so that the effort required to keep up with the programming just isn't worth it.

You guys are much smarter than me.

Create some type of artificial intelligence to combat this. Have it adapt constantly to make their lives miserable.
But please don't make the lives miserable for the players that have been here the longest and like to play in wild format. We are the senior players. We have seen the investment in older cards go nothing but down. We know the new cards will have the same thing happen to them over time, so why on earth would we want to buy new packs of cards?
Fix the botting problem, eliminate the modern league experiment all together. Encourage people to buy and collect cards for the long term. Cards should gain value over time due to them being rarer and rarer.
I get new packs need to be sold, but there has to be a way to reward players to want to buy and collect cards.

thanks for your time.