Maybe include a daily DEC-B airdrop to license holders for ~1 year to offset the loss of the vouchers. People make these financial decisions and the loss of vouchers takes a huge chunk of the ROI away and licenses are another failed promise by the team.
I think a new PVE game mode like soulkeep would bring in new players and also give a reason to burn DEC. Just copy the code and make it with splinterlands assets that are already in the game. I'm really enjoying the soulkeep and since it's launched you can see the DEC supply dropping far faster than anything else that the team has done.
I think the best part about soulkeep is that you can play the game a couple of times a day without even investing and then when you decide to buy a card or 2, because of how they set up the levels of cards, it's easy to buy a couple of cards at a time while you're working your way through the ranks. It's much easier to get someone to spend a couple of dollars every week or 2 than it is to have them spend $2000 once which is why things like battle passes exist.
I'm a license holder and I would prefer to get glint over dec-b. Dec-b will slow down the fly wheel just like vouchers do. In my specific case, I'm behind my peers in terms of soul bound reward cards and the extra glint would help.