There are plenty of EMs with good flow. In fact, I would argue they almost all have great flow. The only time where the all isnt moving is in a saucer generally. And they can have some truly unique layouts and rules. There are even some that have multiball. As for complexity, it depends on what you mean. Are the rules as deep as a new Stern, or JJP? Probably not. At least in terms of mechs. Pinball is the same across every game ever made. You hit switches and scores points. Card themed games can have you hitting a changing target to get the right pair to beat the dealer. I have an OXO that is tic-tac-toe themed. Its not as easy as you think to get 3 in a row. Now, as for a modern flipper feel? Not gonna happen. They wont be as snappy, but for some games you can high tap the transformer to get more flipper power and snappyness. This is not always recommended though. Just saying to give them a chance. I did and fell in love. But that is a story for another day.