As the person who made the claim, I stand by my statement. Current Disney is more engaged in improving/plussing rides than at any previous point during Iger's tenure. Still far from perfect and there is plenty to gripe about, but there has been some clear willingness to actually invest money into existing attractions to make them "better" and not just accept them as "good enough". e.g. BTMRR, Buzz, FAE, CoP. You could also argue CBJ, HM, and Ratatouille (though I know there is debates as to whether they are/would be "better" but it is nonetheless an investment and goal to make them more engaging).
Again, while I think there is virtually no chance that the Yeti is fixed anytime soon, it feels like it would be more plausible under the current operating environment that anytime else since it stopped moving. Maybe it could be considered soon after Tropical Americas opens if they feel they have the capacity to work on Everest though again I would consider it a substantial longshot.