I think we all appreciate the effort that WA is doing to improve their extensions for us, however from your above list i still have the feeling i can do the same things with the individual extensions, just not from a wizard. To be honest i never was and never will be a wizard user that much as i always try to integrate the functionalities of your extensions in my sites. That way you have much more possibilities to acomplish more advanced tasks then from awizard.
Again is WA you are doing a great job because your extensions are a great time saver, however in this case with Data Bridge i'm a little dissapointed because i believe it does not give me much more functionality then before.
I would like to purchase it for the same reason as Design Extender, to have all extensions into one installer and also to benefit any future updates (as you mentioned with Design Extender, will only be updated, not the individual ones).
I think many will agree but maybe if you put some great tutorials or videos online which shows the big benefits in functionality of Data Bridge vs individual extension then maybe i'll change my mind. For now all documentation and videos are from the extensions i already own so no need to spend another $149.99
Keep up the good work though!