You're expecting way too much from Game Freak.
Nintendo should take in the IP internally already. Cause on the Switch, we should be getting pokemon games like this:
DQ XI was developed for 4 years while Pokemon Let's Go was likely done in significantly less time than that. And I doubt Game Freak would allow Nintendo to take their IP like that. Nintendo only has the trademark and publishing rights and I think they're more than comfortable with being in that position (though maybe only having a fraction of the revenue of Pokemon Go, as they are not the publisher or developer of that game, may be disappointing for them).