It's definately possible to play with no stealth (as it's generally possible to play any way you want) but using stealth is very useful. I'm currently playing a "shoot everyone" playthrough and I still use stealth to set myself up (much like in Uncharted 2). I still find it fun but I think it's more rewarding to combine both stealth and action. There are a fair few augmentations/abilities designed for action based players too.
I reckon you'd enjoy the combat as it does play like Uncharted. I don't find ammo to be a problem either and as I said I'm currently playing a "shoot everyone" style game. Just remember to try to take down targets quickly using head shots and you find you have plenty of ammo.








