Pit design

[Erro]

So, I am researching pit design as part of my senior research project for school, and thought I'd see what all the FIRST people out there have to say. Note that when I say pit design, I mean the carts like the nifty ones MOE and many other teams use to carry parts to and fro, as well as in our robot lab. I do not mean to restart the two-story pit discussion. Can anyone think of problems/improvements to some current designs? More efficient use of space, materials, cash, etc. Safer pits, better design, etc. Anything thoughts on the topic are welcome for the benefit of all teams.