Personally I think that the class/job system is much more "well-rounded" and "free of fetters" than things would be if we only had jobs (at least, the way jobs have been envisioned so far). Rather than being meaninglessly complex, I feel like having both classes and jobs adds a level of interesting depth to the ways we can use our characters. Since jobs can sort of be considered advanced versions of current classes, I'm not sure what about it would be confusing once we see the whole picture. Whether or not it's confusingly complex is probably something best left to be determined once jobs actually come out, though.
What about the times when players want to solo or low-man something? Not every role is well-equipped to stand alone or in a small group, so in these settings classes will really shine.
I agree that having classes defined by their weapons may not have been the ideal way to go about things, though it was an interesting concept. This fact may be part of the reason why Conjurer is a fairly poor melee fighter while FFXI's White Mage was relatively competent; White Mage could use hammers, which were good for smacking things, while Conjurers can only use canes and wands.
I think it's very likely that classes will eventually branch off into multiple jobs. It worked really well in games like Ragnarok Online (old MMO, I know, but still a job system people love) and Final Fantasy Tactics. They might instead go the route of adding new classes to become new jobs, but even in that case the path from generalized class to more specific job becomes an interesting measure of character progression, at least to me.
Once again I disagree, and I think Jennestia put it well. Even in your own post you hinted to it: they can coexist nicely because they ARE mutually exclusive, so the fact that they differ so much doesn't mean they have to work against each other. Each one has its appropriate time and place. The Armoury system has been drastically altered from its original beginnings, but I think it's evolving rather than being destroyed. I agree that trying to saddle the job system on top of the old class system would've been chaos, but I think recent class changes have made it so that the two can work together quite nicely. Like the guy above you said, maybe by the time jobs are released, current restrictions on classes can be eased somewhat, since jobs will present a clear direction for those who desire it.
This system sounds really awesome to meIt would be great if they considered something like that!
As I said earlier in this post, what about cases where you need more flexibility? I'm happy to see jobs being added, but I don't think classes need to be removed just to make room for them. I agree with the people below you who are saying that flexibility doesn't have to lead to homogeneity. However, I think I'll take the middle ground in this argument, since I feel that classes were in need of reform, but those reforms seem a bit too stringent for my tastes. Perhaps as more classes/jobs are added to the Armoury, the need for cross-classing will decline, since players will have more options as to the roles they can assume. However, such additions will be a long time coming, and until then being able to build our own skill-set from the five DoW and two DoM is the best shot we have.