We're far away from a post-Trump Republican Party. I think the next person that takes control of the Republican Party to make it in his or her own image is going to be a person that is not anti-Trump, but is also able to stave off the most Trumpiest aspects to form their own identity as a president and leader of the party. In other words, how every political party change in policy has ever gone. Trump finally killed off Reagan's influence on the Republican Party. The Democrats are still influenced by Obama although Bernie Sanders clearly would rather them not, and you see clearly the Obama trap for the Democrats that Republicans had in the Reagan trap.
Thank you for answering, it's great to understand your perspective! Your answer here really resonates with me- this where I am with socialists who think the Democrats can be changed. Sanders and Ocasio-Cortez have the right ideas, and I support them for it and for their efforts to raise awareness from their positions, but their electoral strategy will only disappoint. Not only do the parties gravitate toward personalities over ideas, but the two-party system itself is designed to limit debate. But, preaching to the choir here.