XIV's new battle system is fast paced, while XIs was more outlast. I doubt you will have to worry about gear sets in the future for XIV, atleast not as bad as it was in XI. That and since you can't change gear during combat.
I see nothing wrong with the Ilevel system, I just think they could've done it a bit better, instead of giving us Ilevel90 gear at level 50...

I'd also like to point out, that ILevel wasn't blizzards invention, it was actually D&D/Bioware's "invention"