Played some more this evening. I've come to the conclusion that the open world is the only thing still drawing me back - I love a world with a lot going on in which I can wander as I choose.
But at this point, the gameplay itself just doesn't do it for me. I rarely quit a game before completion, and I like the characters and the general story, but I feel like I'm just going through the motions on the actual missions. I feel like they're all now basically the same - find a way to get to an upper level to reach a physical hack, use the chopper to solve the "pipe" puzzles, use the little hopper to go into a shaft or hop up to some hack I can't reach.
Money is completely irrelevant at this point; I think I've got $300K or more, I don't really keep up because there's nothing I really need to spend it on. I've pretty much got all the research items I want; in fact, the full gang "tag" one is pretty overpowered (I am playing a mission where there's a LOT of guards and I know it should be a real stealth challenge, but I just tagged a couple and had the full powered gangs come in and start a shootout, and there are now no guards anywhere!) I have fun with the SWAT/cops option; if anyone on the streets messes with me, I just mark them and watch the cops come and take them away!
In general it's a pleasant time waster, but not a game I dream about. Skryim, W3, some of the great games, I would find myself thinking about enough I'd sometimes have a dream with some element of the game in it. WD2 is a game that I am playing while I figure out what to play next that will totally grab me.