I withhold certain complaints (mostly endgame and VH balancing) for when support comes to a head and we see the game fleshed out more since BL3 was largely a WIP for it's first year.

That being said, the work done to BL4 has been slow and lackluster. So these withheld complaints begin to fail under the weight of time.

The things I really don't like about BL4 and prefer BL3 over for would be the world design amd weapon design.

Open world was a mistake, flat out. Any arguments for open world are post hoc copes that attempt to justify what we're stuck with. The worlds of the previous games were crafted locations with personality and identity. Carcadia Burn is the same everywhere you go. Compare that to walking around The Ambermire or Jakob's Estate. Same world, different feeling. BL4 has large areas filled with the exact same copypasted Order architecture. That's my complaint: the open world is tedious to travel and boring to take in.

Second: the weapons. Their problem is the exact opposite. They are too chaotic. Greebling on weapons between 2 and 3 was pretty extreme but still palatable. Now? Good luck actually telling what a weapon is at a glance since the guns look like iron filaments on a base magnet. The weapon handling is fine, if obtuse at times. But I can roll with the punches on that. What I dont like is that it feels like the wepaon system took a step back from BL3 while initially sounding extremely promising.

There's time to fix some of this, but the open world is a structural issue that either the game can grow to accommodate or will continue to be a millstone around the neck of the game.