As others have suggested, be sure to check out the Week 11 Update (which has all the necessary updates from the prior weeks).
Combat runs quite a bit differently than described under the Skills chapter, namely ranged attacks have a set dificulty based upon how far away from the target the shooter is, and melee attacks have a set difficulty.
Also, damage values were dropped, particularly vibro-weapons, so that might reduce the perceived lethality of the system.
Plus, don't forget that Soak Value reduces the damage total before it gets applied to the target's Wound Threshold. I've seen a few folks make that mistake, players and GMs alike.
Lastly, just becuase a PC is pushed over their Wound Threshold doesn't mean they're dead. It just means they've been beaten or blasted into unconsciousness, and have a lingering injury to show for it. A PC in this game only truly "dies" when they suffer a 150+ result on the Critical Injury chart, which on average is going to require a lot of punishment, particularly if using weapons that lack the Vicious quality and/or don't have an absurdly low Crit Rating, such as is the case with most blaster weapons. PCs (and Nemesis-tier NPCs) can actually suffer up to double their Wound Threshold and not die, with any excess damage simply being ignored past that point (other than the target suffering yet another critical injury).
All that said, combat in this game is dangerous, and most PCs are well-advised to at least pick up a set of heavy clothing (compariable to what Han was wearing for most of the Original Trilogy), as it provides a very useful +1 bonus to their Soak Value, giving even a Brawn 2 character a final Soak Value of 3. And knowing when to fold can be useful to. After all, Han and Leia surrendered without much preamble when Palpatine's trap was sprung on Endor, same with the Imperials that were escorting Leia and Chewie to Vader's shuttle in ESB when Lando sprung his little alteration to Vader's deal. Hell, Han very quickly turned tail and ran away as fast as he could once the stormies he was chasing on board the Death Star came to realize it was just one man (I much prefer the pre-Special Edition version of that scene). And like Obi-Wan said, there are alternatives to fighting, so be sure that your players have options beyond fighting to deal with a problem; this ain't AD&D where you really only get XP for killing the monsters. In fact, in the latest Order 66 podcast, Sam Witwer gives an excellent example of his PCs pretty much bluffing their way right past a major encounter with nary a shot fired, leaving the intended enemy scratching his head and wondering what the frak just happened.