That vehicle proposal is actually somewhat interesting. Mobile mining vehicles ARE canon (Lando had one). With the proposed R&D tech tree, and coding-wise, would researching such a vehicle be possible in the future?
Too hard to say at this point. Especially since not a lot has been worked on for R&D in the first place. Whatever has been done could be scrapped and redone. We did it with the RM equations numerous times. At this point though... it's just too far along to give any definitive answer.