Instead of wasting everyone's time debating whether or not there will even be a D4 I'll entertain the OP's original question and state something I feel very strongly about -- fair play and the leaderboards. The D3 leaderboards. What do they really mean if you have botters, players who use map hacks, and I'd go so far as to say players who choose to use NumLock. There are 6 skills we have to juggle. 6. And not all of them for any build even has cooldowns. So, you're telling me you cannot manage cooldowns? Waaaahhh. My wrist hurts! I need the computer to automatically cast my cooldowns. Pffft.
But, I know I'll get flamed. Especially coming down on users of NumLock. But, for D4 Blizzard has to come up with steps where we all are essentially doing the same thing. Yes, there is RNG and that's okay. But, if you allow botters, map hackers, and NumLock users to be on the same leaderboards as legit players, then what do the leaderboards even mean? Have two sets of leaderboards. I am not going to spew hate and say botters, NumLock users are bad players, lazy, whatever...do what you want to do. BUT...if you want to give yourself an edge, if you feel like you have to do botting to stay competitive, fine. You get lumped into these leaderboards over here, and everyone else gets put on the official leaderboards. Maybe there is some way as soon as the Guardian drops, that Blizz knows if you NumLocked, or have bots on your account.