During my 30 minutes of the demo I took a different approach than yourself. During the rounds I played only the anti-infantry class. The grenade launcher is indeed overpowered, it is either a direct killing hit, or you'll have to touch them with a bullet afterwards. The fact ammunition regenerated made use of the main gun only as a backup. You could even try and take out tanks slowly from cover with the grenades. Since you get 3 grenades in addition to the launcher, you could grenade spam as much as you wanted as long as you found cover to wait for rfesupply. The ammo crates of the past are no more.
I appreciate the inclusion of a tutorial stage, which is playable past the 30 minute time limit. May help newcomers, but nothing I didn't already know.
I also played on the PS3, and while I wasn't dominating, I was doing well. My problem was I would be stuck on deserted parts of Wake island, giving me no chance of points or kills. When people were around I owned them. The PS3 players are inexperienced movie-goers.
A feature you didn't mention is the Bombing Raid. Basically, you enter a radar tower where you are invincible, and guide 3 bombers to carpet bomb a section of your choosing. Unfortunately, the bombers are so slow and unmaneuverable, that you must line up 2 minutes in advance or else you'll miss. Sort of wished I could move them more since if enemies are there, I should be able to to aim and bomb with little resistance from my own controls. Also, that is what the air support is for, they should be able to pick off my slow bombers. Why should I be penalized by my plane;s problems? I only get one carpet bomb anyways, why not let me get the target I want like the Artillery of old.
Playing around with the aircrafts, I found them slightly annoying to fly, and harder to aim. Only for dogfights and removing bombers in my book.
It bothers me that reviewers praise the graphics as if they were extra special for DLC. Well, let me put it this way. Burnout paradise can be DLC, but wait, it was also a full game. So you guys want good looking DLC only games? Well, I hate to break it for you, but the graphics aren't really DLC only, 1943 running off the Frostbite engine is basically a slimmed down version of Battlefield Bad Company. No unlocks, you just get out and go kill stuff. So in a way, it IS a retail game experience, because it owes its manifestation and graphical technology from a priory released RETAIL game. The groundwork and money down was already set, now it was just changing up the graphics and settings a little bit, and re-releasing for more money.