(Sorry if the tone comes across as grouchy.... been a long couple days)
Speaking kind of from the other end of the spectrum, I am primarily a drafter, in charge of one of the drafting teams that we have here, and I see a lot of variance. (Not an engineer, never went to school for engineering.... learned autocad, and that's been that.)
There are engineers that look down on me, or treat me like dirt because I haven't had the training and classroom experience to "make myself worth something and get my stamp" (yes, actually had something like that said directly to me) but, when it all hits the fan on deadlines, some of those are the same guys puckering up for me to get their drawings done so they can send them out the door, because they never learned the "tools of the lower masses"
Some of the registered engineers that we have in-house can maneuver through autocad, to get simple dimensions or add straight lines or text, but that's about it.
We also have engineers that are pretty adept at mid level autocad activities (no or little 3d, familiar with xclips, dynamic blocks, etc, but little to no experience setting them up)
Then, we have drafters, that can muddle their way through but know less than some of the engineers.
Last, we have a few that are pretty adept in most levels of autocad, including 3d, and can get it to dance to about any tune.
Best projects are those with the capable drafters, and engineers that know autocad pretty well.
Worst projects, and always profit loss jobs, are those that have the lower level drafters and engineers that don't know it either.
Could all that be corrected? Sure... but politics......
Anyway, all that boils down to say, learn as much of it as you can. Even if you don't use it often, when you can teach the "drafters" that should know better new tricks... one more reason to make yourself indispensable. (assuming the company looks at performance instead of "who knows the dirt politics")
Beyond that, as mentioned above, I would also HIGHLY recommend some type of board drafting class, if you've never had one. As I explain it to people here, running autocad is not drafting. Drafting is a way to convey information in a logical, legible manner, and board drafting makes you think more for that, with sheet layout, which views to draw, etc. With that, it's not quite as easy as saveas and change a note.
Autocad is a tool to use to convey that information, but I believe definitely worth learning. (Minus the whole 3d modeling that... that's an entirely different world.)
If not autocad, depending on your field, then Revit, Inventor, Solidworks, Catia, etc. The more you know, the more youhave to offer.