The only complicated thing about the SCID (beyond the obvious issues regarding the nuances of diagnosis and when criteria actually apply) is the format of the thing. I'm convinced the copy editor was in the midst of a manic episode, high on meth, and probably not too good at their job even independent of the above during the time it was developed.
You're not going to find an easy path to diagnosis (at least not a valid one), because the reality is that it IS complicated. If you are looking for pure efficiency of administration, I'll second the use of the MINI. Administration time is about half that of the SCID, and is about as valid for most diagnoses. In fact, I'm trying to convince my lab to switch from the SCID to the MINI for future research. We have way too many studies going on for the SCID to be a practical option since participants have to be scheduled around the time of grad student and faculty availability, take an immense amount of time, etc. That said, I actually dislike how the validation research is done on these measures (i.e. I'm not convinced someone diagnosed on the SCID but not the MINI constitutes a "False Negative" since that assumes the SCID is correct). It could be better or it could be worse, I'm not sure the research tells us.
Either way the MINI is a bit easier to use and a bit shorter. You sacrifice a bit of depth and information in return. Its designed to be used by people with relatively minimal training (i.e. trained bachelor's level folks) as opposed to clinicians, so it is a bit more straightforward.