I support everyone's right to the Enterprise of their imagination.
However, 947' was
MJ's intention. Discarding that figure primarily because the hangar deck doesn't seem to fit ignores a more important and better documented full size set that does
fit the 947' size: The bridge. At the intended scale, and only at the intended scale, does the turbolift fit into the visible tube at the back of the bridge dome. It seems misplaced to reject the 947' feature because the miniature hangar set (which we're not really sure of the dimensions and configuration of) doesn't fit, while throwing out the obvious and well documented bridge scale cue. At the very least, hanging on to the intended length is not "silly."
Once again, I'm not saying one cannot have a bigger E if one wants it. I'm merely pointing out that staying with MJ's size is not silly or indefensible.