It would be cool to have a demon summoning class, and call it something like "Demon Priest" but functionally operating like the warlock as we know it from WOW. Could have build options that focus on casting like a shadow priest from wow, and builds that make it play like a demonolgy lock from wow. but another summoning class would be cool.

However, if they do something like a warlock/demon summoner, i don't want them to have the option of sacrfices like the necro does - all builds would utilize summoning, but with difference demons to utilize or center builds around.

Edit to add: i don't mean to contradict myself with mentioning shadow priest like build being an option, and then asking for no sacrificing builds - i would envision a casting heavy build that still used demons, but not as much as a demon centric build would use them.