“Republican and Conservative are not synonymous terms.”
You are correct, of course. In one matter that the President has much say, it is less dangerous for the President to be Republican than it is to be Democrat - court, especially Supreme Court, appointments. This is generally true even if the Republican President proves himself to be a lot less conservative than he might have pretended to be during the campaign season.
We already have a Hillary Clinton appointment on the Supreme Court - Ruth Bader Ginsberg - we really do not need any others like her.
I see no reason to believe either the republicans have the stomach for, or the democrats will permit, an actual idealogical shift of the SCOTUS.
We've gotten all we're going to get on that front.