Yep, there is definately a problem. I tried doing a +90 dex build for my Gladiator to improve my block rate. The Gridanain Buckler is definately a huge improvement in block rate. However, with or without the dex build I barely noticed any improvement to block rate. This good block rate with Gridanian Buckler though only applies to Normal Mobs and not any of the ridiculously high level mobs or NMs. Thus why I was attempting a high dex build. So as of now, nobody should bother waisting your time, your better off using Def, Vit, or HPs..... And Grid Buckler for trash mobs, and anything you can put materia on for NMs. Its a shame really. Who knows maybe they will make adjustements to make stats matter a bit more. If they dont I hope PLD at least has more significant block rates. I also wouldnt mind seeing +Block rate materia and a crafed shield with stats as good as Grid Buckeler so you can have the best of both (high block rate + materia).

Sorry I got a bit off topic, but the crux of my problem does originate with a lack of performance from enhanced stats.