It's not an outrageous idea to sell him if Poch believes he can be adequately replaced, but I wouldn't let that happen this season since we already lost Walker and it's already so late (season already started). Add this to the way he acted which may encourage others to do the same if they are in a similar situation. It would also send the wrong signal to appear to be bullied into selling.
I don't want to lose Rose though, and he does add an extra dimension Davies just can't do because of his pace and dynamism although Davies is a good player in his own right.
Shaw could provide that dynamism if he was brought in as part of a deal; that was one of his key attributes under Pocchettino at Southampton and then Van Gaal in 2015, the capacity to drive forward with purpose.
It's not as if Rose is an absolute assist machine either; most leftbacks with licence to bomb forward in that Spurs team would eclipse Rose's output in that regard. Bertrand, for example, could easily outdo it.
Alderweireld, Vertonghen, Alli and Kane are probably four of the five must-keeps, in addition to Christian Eriksen, who for me is fast developing into the best player in the league; he's beginning to roam and dictate the tempo of games, and is starting to remind me of Scholes.
Everyone else is replaceable with Pocchettino in charge; IMO he's the best player developer and coach in the league. Mourinho is the best tactician and has more nous with regards to pacing a squad over a campaign and managing season-long sustainable pursuits of success, but I think if Pocchettino learns when to take his foot off the intensity pedal, he'll become an elite level manager too.