As much as I love the old 200 series hoes, I don't think catwalks are necessary on the 329. Everything is already accessible from ground level or from on top of the machine. Catwalks would be nice on a 336, and they ought to be there on a 345, but I can live with it.
As for the computers, I like the reliability and power of computer free machines, and for my kind of work, I would have preferred a computer-free machine (I have a modern fully computerized Deere). However, computers do provide some advantages - mainly improved fuel efficiency and the ability to do smoothly perform more than two functions simultaneously. I guess the computers were necessary to compete in foreign markets where fuel is more expensive (such as europe).