For me the major stepup is that this is great foundation for quick and easy updates and easy to keep adding new features. So we will listen to you guys and try to introduce as much of those features as possible.
The same PvP gambling that came out during the time of pd3. I don't know why was it removed. It was a great way to build up interest in chat and stay people hooked up.
I'm pretty sure it was removed because not many people used it, and if that's not the real reason then it's because there's no reason for PD to offer a free service which they don't profit off of.
I didn't tried it, but I saw PvP in other sites, and normally the house keeps up to 10% of the players prizes. Example: you bet 10 satoshis for rolling below 50, I bet 10 for rolling above; then you win, and you get 18, instead of 20.
If Primedice can improve the house edge on PvP, I'm sure it can be a success.
Doesnt matter at all when there will be no one that is going to use it . It was taken down because most people dont use it at all and on the past there has been some pvp dice site as well and now those sites are gone. However if you check Stunna's message you can see that it is ready so probably it is going to be ready ( or already ready ) soon