There will be no finger pointing game.
Aaronace, there is no need to hold up an act. No one is leaving on bad terms and you, GM or not, hold zero innate power whatsoever, no matter what you might claim. The only power a gm has is to be an arbiter for however long the players put their trust in the gm. There are two major ways to gm. One is the type where you set things up and let it go to be a regular player who will not really exercise gm powers. The other is where you have a specific idea in mind and expect it to be the skeleton of the story, overruling everyone else's direction. With the angels and whatnot, you are most certainly choosing the latter here which is the same as signing up for babysitting. To the players, if you're unsure of the direction, start asking. To the GM, if your players aren't getting it, it is because of the GM's failure to lay it out on a platter. When someone has a particular way they want it done, it is the same as clipping the creative wings of the RPers because they have less wiggle room, trying to keep the plot going in the intended direction. To make up for that, the gm must carefully guide to keep things running smooth. You're done with nothing. There is no "Am I understood?". The gm has the power granted by the respect of the RPers and no more. In exchange, he is the problem fixer and the pace setter as well as the controller of incoming events. With that comes the responsibility for happenings or lack of happenings. If someone does something dumb, the gm gently guides it to a correction. If something doesn't happen, the gm helps guide it to the intended or makes it work. If a player disappears, the gm figures out how to make the plot keep flowing despite that whether it is through a replacement, someone else doing what needed to happen, or whatever needs to happen. There is no finger pointing that a gm ever has to do towards anyone else. Promote unity and good flow, doing more work than everyone else and accepting more responsibility than anyone else. That's what it means to run the show.