I honestly dont think you have a choice with Dembele and Alderweireld, they are both on the move for different reasons. Dembele because his body just cant keep up with the physical demands and Alderweireld wants more than Spurs are willing to give him wages wise. Rose has been on the out for a while no? Again for the same reason, he wants more money, didnt he come out in the press and have a go at Spurs for paying low wages?
If Dembele stayed he would be playing a lot more of a bench role, you are right Grealish and Cook are both a step down from Dembele. Just dont see Levy/Spurs stumping up the 60mil it would take to buy a midfielder of equal skill. So the usual modus operandi for Spurs is to invest in young talent, and two players in for 1 out gives more depth, albeit not in the same league as Dembele. How much would Palace demand for Zaha? He has what, 2 years left on his contract?
I thought you had a ready made replacement for Rose with that academy player Walker Peters?
I thought Sanchez had a good first season from the limited amount of games I seen with him playing. But going into a season competing on four fronts with only 2 recognised CB's is risky, but totally Spursy. Depends on how ready that South American kid is to step up. I guess Dier can always play CB in a pinch.
We could definitely keep both for this window, Dembele is inevitably on the move but if we signed another player as depth, we could use him more sparingly. Alderweireld could possibly stay and then move for 25 mill the season after but I do expect him to leave and hopefully be replaced, because if he isn't our CB depth is going to be extremely poor. Rose did want to leave, but then realised nobody wanted him anymore because injuries have fecked him, so he'll stay now. Nobody is paying him lots of money to sit in the treatmeant room half the season.
Levy probably won't pay up, but if we sell Dembele and don't bring in someone who can actually fill his shoes then he can get fecked. One of our most important players is going to be phased out of the team, you can't bring in youngsters who will need time and development. We obviously can't afford to go out and bring in a Matic, but we'd need someone at least semi-established, not a championship player or somebody who had a decent season at Bournemouth. We've invested in talent but also brought in the likes of Wanyama, Alderweireld etc in the past, so we do signed older, more established players if the price is right.
Palace don't have time to replace Zaha and he's by far their best player, their future in the Premier League could depend on keeping him this window. If we want him we've likely left it too late because Palace can't replace him with a few days to go, and if they didn't replace him they would almost certainly be relegated. Again, out utterly ludicrous negotiating 'strategy' of leaving absolutely every deal to the very last minute 'to get the best deal possible' has been an utter failure this window, and will probably lead to us running around like headless chickens on deadline day. Walker Peters is a right back.
Sanchez had a good first season, but was at times inconsistent and still needs time to develop. He shouldn't really be always first choice, and a much more preferable situation would be to have him rotating with Alderweireld or in a back 3 when we play that way. To actually choose to only go in to the season with him and Vertonghen would be madness, but as you say it would be proper Levy stuff, and no Foyth is not ready to step up. Dier at CB is an accident waiting to happen unless he's in a 3.
Basically, if we were to sell the three you mentioned, we'd be getting rid of 3 key squad players (2 of which are clear starters when fit) without actually properly replacing them. As much as I've criticized Levy, even I doubt he'd want to leave Pochettino with the absolute bare bones, so I don't see it happening. Toby is by far the most likely to leave, the other two I imagine will stay. As for any other business, I don't even know anymore, Grealish seems like the most likely but I don't see any other solid links aside from Zaha, but again I can't see this happening because Levy won't pay the fee.