Regarding the Smart Gun. It's very effective when catching people off-guard (hence being applied to the assassin class by default), but if someone notices you trying to lock in, you're going to die. Any other weapon will trump the smart gun 1-on-1. If they go invisible when you're trying to lock-in, you're going to die. Just like every other weapon in the game, there are plusses and minuses to using them.
Finally Jeebus!!!, Got in last nite and my thoughts are similar to yours. As an avid CoD BO2 player the auto aim pistol is worst gun I have ever seen. I'm in duel w/ another pilot, I'm doing the correct CoD manuever (ie moving as ADS (aim down sight), other pilot jumps runs away and Bam I'm dead. Kill cam he hip fires way way off target, Auto Aim allows bullet does a abrupt 180 turn mid air and kills me!!!! I realize these games are not supposed to be realistic, but when I'm at range from 10yd out I'm very accurate single action ADS w/ my .45. One handed, double action Die hard mode , not so much. The auto aim pistol hip fire > ADS shot is a game breaker for me. Game is promising and that is one glaring fault that stands out for me with about 3 hours played beta.
It sounds like you were already injured or he already had the drop on you and were mostly locked in. It wouldn't have been a bang-bang play like you're describing if that wasn't the case. I believe jumping negates a lock with the Smart Pistol (not positive though, have to check). Just because something worked in another game, doesn't mean it will work here.
In an fps game, AI should be a little more than fodder for your kill count in my opinion. There have been people talking about the AI just standing there at times. I think people expected them to fight back a little bit more.
If you run into a pack of them, or are already injured, they can cut you down. They are not intended to be brainy. Instead they're adding a new strategic element to the game.
IMO, AI should not exist in a FPS.
AI = pointless filler
They're not pointless though. I've read this complaint in published articles about the game too. They fulfill a purpose, thus having a point. Yes, you can ignore them, but pilots who purposely go after them will get a Titan faster than you. Then they'll be able to guard a hardpoint more effectively. Watch the final score chart and notice who has the most minion kills and where they sit in the ranking. I've gotten MVP on Hardpoints with the fewest direct pilot kills.
Titanfall isn't all about killing the other pilots alone. There are additional elements that add an element of real strategy to the game instead of just being really good at situational awareness.