GWT reduces complexity for this sort of thing imho - the complexity comes more from the way the client and server code are tied all together, the rather excessi

GWT reduces complexity for this sort of thing imho - the complexity comes more from the way the client and server code are tied all together, the rather excessive abstractions and factory processes, and some legacy stuff. GWT should be just a pretty simple client that crosscompiles nicely to browser specific, very optimised, js.