You do realize healthcare is not a walk in the park. Obama was handed the ACA complete plan when he won his first election during his transition phase in Chicago and was simply tasked to "sell" ACA/Obamacare to the people and Congress (ACA was built by Insurance and Lobbyists hacks behind the scenes). It basically took up his entire first-term. Trump has to strip away ACA as much as possible and then re-build a program to supplement it. A program that has to integrate with insurance providers, legislation and budget allocation while fending off the legal/political attacks/hold-ups along the way it will face.
It may not be a walk in the park, but it's been 4 years and no proposal. Just empty promises.
Also there is a simple way to address this -- make Medicare available to everyone, at market price. If you're under 65, and you want healthcare, you can buy into it. If your employer offers a plan, use that. Maybe your employer will even find it easier just to give you a bit extra to cover you cost fro medicare, instead of offering their own health plan.