Look into this point of view; Professors, Wizzards, Stalkers and Snipers are dependant on their weapons to be able to simply act. A metaling card can completely cripple them on the spot if they're not protected. The server is extremely gear-oriented, stripping is an very cruel tactic.
With 'Stalkers are over-reliant on their strip' i mean; Full Strip should be the trump card up their sleeve...not their bread and butter, and the same applies to all stripping strategies that don't belong only to stalker. As it stood, Stalkers would win easily as long as they could strip, and lose just as easily if they couldn't, this scenario is proof of weakness of the class.
Now you look at this bigger picture; For the last months/years of FRo, STR-oriented classes where undisputed as the DEX and INT based ones where always eclipsed by them. Through buffs given by new items released, INT and DEX classes are now up to par to them in many scenarios, that, my good player, is balance; fair chance to all in the same environment.
Make no mistake; high rates revolve around damage and good gear. Skills such as Lex Divina, Dazzler and Hammerfall which were keys to some jobs became useless in this scenario, so they must adapt.
Even on full strip, a high leveled Sinx, Wizzard, High Priest, etc, was still functional on a low rate standard, in a high rate that revolves so much around gear such as ours, Full Strip would be equivalent to a skill that makes a 99/70 into a 10/1, being such a powerful debuff that strip is, and accessible to all for use through rare cards and items turn common, it needs a counter up to par, which the easy access to FCP makes up for just in the right measure.
Even if FCP lasted half of what it does, simply walking up to someone and hitting them for 30 seconds and have them drop(thus dispelling the buff), is much easier than waiting for 5 minutes so you can strip
As conclusion; FCP's duration is fine as it is(it wasn't altered in the server or anything, it is like this in its original programation). The reason why it should stay as is; many, if not all, classes currently need and rely on their gear in order to so much as simply DO something, that's how the server is. Strip in most cases is just a 'one shot win'. In my oppinion, who wants to just strip and rely on it too much is just someone who wants to score easy wins; strip should be a side strategy to use once in a while on a tight spot...not a main Modus Operandi.