This is absolutely the best set for PvP at the moment when it comes to physical versus physical. There’s no real argument for any alternative.
The problem is that, as mentioned above, magic does not miss.
A viable alternative to the Shade set in PvP for Archers and some Swordsman builds is the Vine set (Cloth armor that gives dex). I personally use 3 pieces of Vine (Boots, Legs, Chest) and the Nephenthes cloth gloves (Accuracy base stat, +5 DEX).
The only problem with the Vine set is that the only real glove option is Nephenthes, which are level 15 gloves that give like 19 accuracy, somewhat forcing you into a DEX-heavy build or socketing accuracy gem.
The only reason to wear plate is if you skimped really hard on CON and are trying to make it up with gear. Honestly, there’s little to no reason for anyone except maybe Clerics to wear plate.
In conclusion, your only two real options for PvP gear is Shade or Vine so yeah, it’s definitely a viable set.