I might rephrase it as, "What are things that a BL1 player should know jumping into BL2?"
Not all of these are probably worth answering in regards to the main question, but here are some examples:
- I seem to recall that aim assist is default on in Borderlands 1. I don't like to play with aim assist. Should I keep an eye out to turn this off because it's on by default in BL2 or no?
- In Borderlands 1, the most effective elements are fire for flesh, shock for shields, and acid for armour. I notice that there are a lot more robotic enemies. Does this mean an increase in the value of corrosive damage, assuming the elements work the same?
- It seems there's a fifth element: Slag. How does this work?
- Considering what I've seen of Zer0 recently, mêlée seems to be a viable play-style now.
- I notice that health and damage values reach the hundreds of thousands.
- Roland the Soldier was pretty much the support character, but it sounds like Maya the Siren is the new support.
- In Borderlands 1, Crawmerax was the main raid boss, with a few others only worth farming for one drop. Has this changed?
- What's the level cap? This and this Q&A say level 50, but I saw level 61, from a source that I trust as non-hacking.
- When did the change from 50 to 61 happen?
- Are there special conditions to getting that raised level cap, like in Borderlands 1?
- Is there an equivalent of the Underdome in Borderlands 2?
- In Borderlands 1, you'd want to judge weapons largely by their rarity, and only replace them if they're outlevelled by 6 or more or so. Is it still the same?
- In Borderlands 1, a gripe is that a weapon that spawns with or without a sight is stuck with it. Are weapons in Borderlands 2 more customizable?
What are the differences to combat from Borderlands to Borderlands 2?