You have an excellent point. With direct election of senate and house and with no filibuster for the minority party in the Senate, we simply have a bifurcated unicameral legislative branch.
Functionally it’s unicameral. All decisions are made in the conference committee and the two houses rubber stamp it.
That the Senate is elected by States as a whole, as opposed to gerrymandered districts (which, ironically enough, ends up giving state legislators indirect control over their house delegations in a way not envisioned by the framers), and that the Senate is not directly based on population, does still make for some difference. Not as robust as things once were, but still enough difference to allow for some creative gridlock—for now.
“bifurcated unicameral legislative branch”
Outstanding. That’s exactly what it is.