PVP has always been about having a combination of the best level skills and pots. It also is about having an understanding of what type of gear to wear with the buffs you have cast. Some buffs hurt 1 set and help another.
What has happened over the years is the pots have steadily increased in level, but the castable buffs have remained stagnant. This can be looked at as a good or bad thing based on how you play the game.
If your a player who was used to selling buffs or being self sufficient all the time the increase in pots level makes it harder to be competitive.
If your a merchant or composer this gives you an outlet to be active in the game and sell potions.
People used to buy buffs all the time when they pvped, now they have to buy potions instead (which is more expensive) but at the same time is just different and requires adaptation.
Adaptation is the key to being successful in pvp, as your constantly adjusting to different stats and setups.
There are all sorts of pots out there that are comparable or better than composing buffs, composing pots have just become almost the same as castable buffs on the easy to buy them and the ability to constantly make them.
As I started this post I mentioned Castable buffs have remained the same max level for years, maybe its time some of them get a revamp on their max castable levels?
Obviously some should not go over 175 like (Treasure hunter, Merchant, Unbreakable, deflect, etc)
Some could use an increase in level like (Keen edge, Smashing hammer, CoA, CoD, Shield wall, Armor boost, Enchant Weapon,etc) Buffs that strictly increase stats.
This would also give people more options to use their skill points on. (I know I often sit with 100's of unassigned skill points as I see nothing to use them on)
This may or may not help with the complaining of overpowered skills... Though I have noticed some people will complain no matter what...