The upgrades are mostly swallowed by the game's continually creeping difficulty - you don't so much feel more powerful as feel like you're keeping pace with tougher Chimera - although the overall spread of weapons does push you into fighting with half an eye on tactics.
Spend all your grey tech on your favourite rifle and you'll find yourself in trouble when the game switches from corridor crapshoot to mid-level arena boss, or from cover-heavy ambush to lofty sniper encounter. It's good, in other words, at making you play with all your toys, even if most of the tricks it uses to do so are familiar from its PS3 predecessors.
As for the combat, mercifully Burning Skies rescues us from having to discuss the strafe-and-turn pros and cramp-thumbed cons of Vita's dual sticks, because they work just as they should.
Time not spent complaining about this can instead be invested in remarking on how Burning Skies looks a bit uglier than you were probably hoping, and how it's a shame that enemy corpses fade into nothingness moments after they're un-alived, and how we've been spoiled by Uncharted: Golden Abyss because this is not what we were expecting at all.
But then Resistance has always been a series with rough edges. The first game had a hero who looked like a potato that had somehow muscled through basic training, and the second made almost no sense at all.
So forgive Burning Skies its ugliness and its empty upgrades, because it's fun, it proves shooters are going to work on Vita, and it allows you to axe a legion of invading monsters through their glowing eyeballs.
Not a showcase for Vita's visual powers, but hard proof it can handle fully-fledged first-person shooters - another solidly rousing slice of Resistance.