There's no way Kvyat will stay either. Sainz going makes sense to place Gasly as one of the 'last' guys in the junior programme pipeline that would be only fair to atleast find him a seat in F1.
Outside of that, i'm rather confident Matsushita will get a raceseat @ Toro Rosso - Honda for 2018, which would be rather logical too. Toro Rosso doesn't have the same pressure as Mclaren. You get Gasly on the Toro Rosso camp that gets total freedom to learn and grow, and then you get Honda's campside with Matsushita who will be the development platform that will give all the valuable neccesary information to Honda without moaning or b*tching.
I wouldn't be surprised to see Honda's development pace go off the charts next season and before midseason we're going to see great things, which are only more or less hampered by the drivers, but it's not like we're dealing with the absolute worst like Ericsson and Palmer.
It's funny that i merely weeks ago stated i cannot imagine RedBull not going to work with Honda, being both based merely miles away from eachother, and here we are having Toro Rosso - Honda, which essentially is RedBull light. Not only will Honda be able to punch in more millions into the project now that they no longer need to pay Alonso's paycheck, and deal with Mclaren's pressure, but they'll benefit from the already extremely healthy RedBull-Honda relationship [yes, its nothing new] and we'll see RedBull surely punch in some serious money too into the project. They're getting free engines, they'll get a free driver in the form of Matsushita for whom they didnt have to invest anything, and they'll have Gasly who they have invested in anyway who will cost them nothing but a 'basic salary', and then they still have Sainz in reserve working for them wherever he'll be stationed.
And then we have RedBull also getting more intel and work into the (renault) engine the past years after the 2014/2015 disappointment with Renault.
If there's a recipy for positivity, it's the RB-Honda combination,
and i'm 100% Sure we'll see a 2019 Red Bull Racing - Honda WDC and WCC competitor, no longer a 'customer' team but a works team.
Now they 'only' need to make sure they're able to keep Verstappen and/or Ricciardo, though i'm afraid chances are slim they'll keep the both of them by then as i'm doubtfull they'll have a winning car next season.
Verstappen is a bit annoyed because of the DNF's, but apart from that he's fine.
Ricciardo is the one who's starting to get impatient by slamming in stunning performances but not being able to battle for the win or WDC on merit.
It's funny that with the Mclaren-Honda split, the best cards now suddenly have shifted towards the RedBull camp, and Mclaren is virtually in no better position at all.
Dumpster sounds so much more classy. It's the diamond of the cesspools.