Lag causing accuracy issues make absolutely zero sense unless the mob moves out of an "optimum" distance for your archer (if such a thing exists). I read the whole post and like Kuro said, your findings are inconclusive.
There are MANY factors as work here. No food, no accuracy on weapons or equipment (shitty equipment in general), mob type or even just a random modifier on accuracy and your shots vs. types of mobs.
I know I used FFXI as an example, but I honestly believe that's find. It's the same company taking many elements from their previous game. Equipment stats, food, mob type and level, etc.
There will be a shit of growing pains while we all learn what influences our classes and combat in general. Right now, there's no reason to worry about it. Archers hit hard, they will miss more and yeah, you pay for that damage when it comes to arrows. Tough shit.
That's it. You can party up with others to xp and use their leves. Later in the game, there will be much harder leves that require a group. Crafting also increases your physical level too (which is proving to be very important). Quests and such? They won't be getting the job done in leveling you up unless things change in the mid to endgame.