So how does it play?

I found few particular things in Reach that are just not so great, and I have a question for people who actually played Halo 4 (or know at least know answers):
How about phisics? Are there slow, big jumps like Halo 3 or quick, low jumps like Reach?
Is melee strong like in Halo 3 or you need to take all enemy shield down before you can kill him with your elbow?
Are grenades strong, or still, you have to take enemy shield down first?
Is there a falling damage?

I havent played it but I have seen alot gameplay.

Jump is like reach,it is better some what to have a low jump so games are more balanced.

melee is still like reaches but when tu was implemented into reach things got messed up. bleed through was way to overpowered. and the way reaches melee system worked before tu was perfect. halo reach was not meant to play like halo 3.

grenades can be thrown way longer as what i have seen. but damage is much stronger to

Jump height and movement speed is said to be more like Halo 3.
I’m not sure, I haven’t seen much gameplay with melees. Its primarily a gunfight.
Grenades are more like Halo 3.
There is fall damage, but it is much less than Reach’s.

I prefer slower, bigger jumps from Halo 3 because they are giving combat 3rd dimension without any jet packs (which imo destroys maps contruction) and other weird items.
I prefer bleed through because it feels more natural to me. I’ld rather risk and attack enemy without depleting its shield, than wait and shoot for another few seconds. I was never good in Reach melee 1-on-1 and I don’t like it. It’s stiff, it kills my groove and I actually like TU. Now see what I’ve just found: http://www.youtube.com/watch?v=pcQWCGpcPAo&feature=relmfu (at 2:25) - am I seeing right or shield poped with the final hit?
I also like powerfull grenades, because in Halo Reach they where useless (until all you want from them is to flashing out enemies from hiding).

I haven’t played either.

Movement is supposed to be more like Halo 3. I think there is bleed through damage, and the grenades are like Halo 3.