THANK YOU!!!! I get so frustrated when people say it is in between Brawl and Melee because it is NOT. It may be in between 64 and Brawl but not Brawl and Melee, there is basically nothing brought back from Melee that was taken out in Brawl.
As far as vectoring is concerned it accurately describes what it taking place better than DI in this game. I think that people want to call it DI instead of vectoring because they don't want it to seem too different. If it appears too different then it makes it sound worse.
People who want to like the game don't want other people not to like it because it makes them feel like it lessens the significance of their enjoyment. They want to fit in and so if they like it everyone has to like it. They don't want to seem wrong and if the consensus turns out to say "it isn't competitive enough" they feel like it will make them seem wrong for defending the game for so long so they hold on and fight all the more instead of accepting it for what it is, competitive or not.
- Higher lag when airdoding into the ground (Melee = 10, Brawl = [I believe] 4 or 8 depending on height of fall and if fastfalled or not).
- No RCO lag [that's Melee and 64, but whatever].
- Apparently safer shield pressure (or no less safe), but no true shield break combos that we have discerned (that would be Melee/Brawl, not 64).
- You can grab the ledge with up+B facing the wrong way (while primarily known as a Brawl mechanic, this was doable in Melee, most notably with Captain Falcon, and this was never present in 64).
- Combos do not require rapid inputs to avoid certain follow-ups (SDI was your only choice in 64, in Melee and Brawl simply holding a direction could limit if not eliminate follow-up options, and the same is true here).
That said, I think the game is Smash 4 - we can compare it to the other games, but as I've shown above, it has elements of each previous iteration in it, and new ones as well (tethers, new ledgehoging prevention mechanics).
I want to call it DI because I don't feel like switching terminology - and the abbreviation is perfect for the mechanic - distance influence.