This won't really help that much, you get a whole 300 something more attack power from enchanting? At 70+ pvp 300 more attack power isn't that much, it won't change unkillable people to squishy daisies O.o
Sure it might help, but it's causing more damage than good, but aeria know what to do best
This is not exact: with a recent patch the amount of attack increase you get from high lv enchant is greatly increased on high lv weapons. http://www.aeriagames.com/forums/en/viewtopic.php?t=1788905
I cannot give exact figure, since we didn't understand exactly how it works. Anyway on 79 weapons enchanted to  it is possible to get up to 1500/2000 attack increase.
On OS this helped a lot - it still too hard to kill imao - but now at least is possible to kill 80 players.
On phoenix you could notice the effect of this system change, since until now was not possible to get high enchant (the new system has effect only on high enchant and only on high lv weapons)