Parmandur
Book-Friend, he/him
4E followed the trend line from 3.x here, took it to the next level; a trend 5E has now bucked successfully.Armor Class is the numerical representation of the character's ability to avoid being hit. In other editions, the character's DEX modifier is added to AC; in 4e, the "level modifier" (1/2 level) is added, as,well, as a representation of the character's growing experience with hit avoidance.
I didn't play 3rd edition on the tabletop, but I played a snotload of Neverwinter Nights PvP, and my observation is that getting the best armor with all the magical bonuses helped you avoid getting hit zero percent of the time.
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