Milchi wrote:(e.g. floating kegs of explosive as a replacement for floating boxes)
That's rather inaccurate. Yes, the kegs can be uses like wooden boxes, but a lot of times you do make use of its unique properties, such as placing them in strategic locations to get rid of baddies. Other times, they are right in the path of a cannon which would blow up a whole group of kegs at once, and you have to quickly move one or two kegs out of the cannon's line of fire to avoid that.
I think I understand what you're saying with the new game elements being mostly "not that innovative", in the sense that they are mostly relatively small variations on one or more of the old game elements. But remember that the Deluxe edition is still based on the same old game engine back from Wonderland and RTW, just a bit updated. To make any truly "innovative" would probably have required some major changes, additions, or perhaps even rewrites of the RTW game engine, and that would've meant another month or more of delay!
Since you said you see potential in the new stuff, perhaps you should start playing around with the editor and see what you can come up with? I did remember you releasing one or two custom levels for the old RTW, it's a shame that you haven't made more since.