IMO, it is still a problem. It is unclear as to what the root cause is. It might be that some SIMs have an abundance of TECH or ATH or some "odd" factor that we have not yet identified as critical to success. I am still trying to use the wishbone in D1AA and I have #1 GUESS rated team (of course, the GUESS ratings might not be right per my statement above). I have not lost yet this season, but there have been some "head scratchers".
I'll never say that all SIMs should lose to all humans.....but each game we play (regardless of opponent) should be explainable, and I don't think we have that quite yet.