Ford provides the cars, but I don't know how deep the tech support goes from there. For sure M-Sport are using the aero developing facilities from Ford and since the engine is built by M-Sport now, probably Ford has finger in that process as well. But if they want to keep winning perhaps they should invest more in drivers too, the best variant is to keep the current line-up, but if Tanak decides to go away, a team with Ogier, Evans & Suninen is not much more weak.