It would be better if the starting weapon was not a loving stuff 10-hit-to-kill toy.
So unlockables wouldn't be better, improved weapons that give advantage, but alternative weapons for alternative fighting styles.
Like in TF2: You got the unlockables, sure, but those are balanced to the already powerful default weapons, so even new players who don't yet have any unlockable weapons can play the game with a little skill*.
Don't tell me that you can play this server with skill. Skill doesn't help if everyone else has an automatic laser-rocket-grenade launcher while you're stuck with a stuffty pistol