AbdulAlhazred
Legend
Personally, I think that the KISS principle is better. A single sentence for both rings and slot items of "If you have more than the allowed number, then none of them function" would have been a lot better. But, they did not write that as the rule. They intended to give the DM flexibility within this area. I'm not sure why they didn't do that for rings, maybe because a different designer wrote that.
Well, I don't see how there is really that much functional difference in terms of taking things off and having things work between rings and other stuff. Still I suppose they could have been worded the same and it would be simpler. All items could be in slots too instead of only some. Try arguing by RAW that a PC cannot wear and benefit from multiple suits of armor at once! (yeah, the armor bonuses won't stack, its true). Its like most of the 4e rules, they are well considered but not always well written.