My hot take is that the two-party system isn't anywhere near as bad as people think it is. In countries with multi-party systems, parties often have to form coalitions in order to govern. In countries with two-party systems, parties have to do most of that coalition forming before the election. That's why we see far-left and center-left politicians in the Democratic party instead of having viable left wing parties.
One way or another, we get a coalition government. Is it better for those coalitions to be formed before the election or after? If it happens before the election, the electorate can see the results in time to change their decision. If it happens after the election, the fringe parties' arguments probably get discussed more, but there's no guarantee those parties will be part of the governing coalition.
What I should have said, is that as an outsider: I see lots of interviews with people who state that they are going to vote for trump (at time of interview), and they all seem to pick and choose from the things that trump says, some they take at face value, and others they consider to be just "the way he talk", campaign speech, or something along those lines.
Now, I don't know, maybe the majority of the people that voted for him actually want to dismantle institutions, maybe they don't and just saw it as an exaggerated way of saying that there should be some cutbacks. I don't know, I just don't think that it is an obvious conclusion from the result.
What additional authority doss the US legislative branch need? They have pretty wide authority to create any laws that don't violate our constitutional rights, I don't know how we could really expand that further (but my view is definitely biased since I grew up here).
I think congress would be well within its rights to change their own rules to add time limits on legislation or required expiration on proposed bills, for example.
If there is ever a conflict between legislative and executive, then the legislative branch can remove the executive branch.
In other words: the president shouldn't be head of government (only head of state, sort of a figurehead).