I'm in favor of gutting DEC creation. Card burn and SPS burn are pretty much the only ways I think we should establish more DEC. That said, I think leaderboards in general need a massive rework, not just the rewards.
They are gamed heavily and it has been the same 20-30 accounts winning all the spots for basically the past 2 years.
The new Rebellion catolog is the massive solution to leaderboard stagnation. Give it some time