A few really cool new additions IMO. I really like the mouse over player ID thing, when you're climbing or in transit to a fight, it gives me something to do, have a look around and see who is up to what, etc. Whoever had that idea should get a happy meal, I'd never thought of it or even considered anything like that, but I'm really liking it. Also, the new .score function of showing the last 10 kills/killed by is another great diversion and addition for interests sake.
Also, the addition of the extra 20 rnds of ammunition to the new Ki43 may not seem like a big deal, but it shows that HTC really listens to the customers when they bring historical and proven documentation to the table in order to effect change. The optimization stuff, I guess time will tell, I'm waiting for some bigger fights tonight to see if it has any effect on FPS on my end.