Tapered laminates are possible, it will just cost extra. The taper needs to continue to the end of the guitar (omega, smooth or point) or it will look strange.
We've made necks with no Maple at all that are stable. With 11 laminates like you've illustrated, the strength is engineered into the beam of the neck.
Without tapering the neck laminates, note that the illustration you made would have some Purpleheart on the tip of the omega carving like this one:
