I've been reading both the OOC and the IC because I am an alternate and it behooves me to know the situation, so here are my two cents.
Balance is a key necessity to any game; because why would a dm wish to tell a story where she either has to downgrade and let the pcs do whatever or she has to make it insanely difficult and kill off other pcs?
I think that you might be missing a key point to Kell's argument, which is the fact you guys have items that really don't go with your character and have no story behind it. A 30th level character geared directly to a domain should not be foiled by a mundane item. What I think Kell is trying to say is that it is no fun when the dm has to go out of his/her way to give a pc something to do.
For example: What if a pc was a black slaad. The black slaad has phenomenal everything. But not only that the have 4 tongues that in a full attack action is a ranged touch that deals on average 20d4. After the initial damage, 11 rounds thereafter the target will take half that. And the black slaad can do this every full attack action. Not only that factor in millions of gp worth of stat boosters and items. Many of you would be useless. How would that make you feel?
But let me put it to you another way. It's the difference between Superman and Batman. Superman is strong and when he gets to a building with no doors he simply throws his body into it. He's that strong. Superman is only moderately smart. And now let's discuss Batman. He has skills. The man is a ninja, rich, and super smart. But Superman can trump Batman in the fact that he's strong and damned near invicnible. The only reason Batman would win is because located in his utility belt is enough kryptonite to kill Superman. How is it reasonable to equate Superman to Batman? Superman hits thing and make them break. Batman is interesting, he has depth. He uses his super smarts, his gadget, and his skill of martial arts. He isn't a one trick pony.
And Wrahn, if didn't matter about balance, how's about you play a 10th level character? How's about you give Kell an inch or a compromise? Because then that would truly show that balance isn't a necessity. What is the point of playing if you are significantly weaker than any other character because they have equipped one or two items that trumps 30 levels of build? Nothing bypasses mind blank or true seeing. If balance isn't an issue, then drop those items. The very fact that you are debating Kell implicitly implies that it does matter. Kell isn't asking for you to change the entire character; he just wants a compromise. A moderation. So how's about we discuss some fair compromises?