This might need quite a bit of work, since it only popped into my head after reading another thread. In that thread someone stated there is currently no equipment reducing LA. Well, except for nettle shirt and pants there is no equipment reducing anything. I would like to see an equipment system though that makes it harder to determine THE best stuff to wear. So not only is more diversity in general necessary, but the proper balancing of it might actually lead to different opinions what and what not to wear.
Example:
A merchant robe still gives you one extra row of equipment, while there is a tycoons robe giving you that vertical and horizontal row, but reducing your LA by 50%. This example of course is well just that: an example. Traveler's sacks already go in a similar direction, by giving you extra space, but taking away your free hand slots.
So to sum this up: Stuff that gives regular buffs vs. stuff that gives higher buffs, but comes along with some disadvantages as well. Of course this would just be so much more fun in a customizable crafting system, where you can chose your own balance between buffs and debuffs to generate the perfect suit for yourself. Balance is key here of course, so items reducing say your LA should provide much higher buffs than something reducing your stealth or cooking. In fact such situational debuffs shouldn't be worth much at all, because I just wouldn't wear such equipment while cooking. An armor on the other hand reducing my stealth, but having a better AC than a steel plate would be worth quite a bit (with a working tracking system...), because both buff and debuff are useful on the same occasions.