Short - No.
Long - If you think that cities, legs and atmospheres are some miracle features that will "save Elite" (from whatever you think it needs saving) you're mistaken. These things are yet another eye-candy. We don't need more eye-candy at the moment, nor in near future. Beyond is FAR more important for Elite than legs and cities.
Absolutely...
IMHO, the core gameplay is (still) generally three year old placeholder mechanics, much of which is not as involved and deep as is should/could be.
Simply opening up on an Eastern front with space legs etc, potentially suffering from all the same short comings seems dangerous to me.
Let's get the core content fleshed out to something becoming of a 2017-2018 space game.
That said, I'd see atmospheric landings as more of a logical next step than space legs. If 2018's paid content was atmospheric landings (
note1), along with at least a modicum of associated/interesting gameplay, that would be good IMHO!
Note1: Lifeless/simple plant life. Not complex life forms etc etc...