More generally, if you look at Spencer's run more as him laying down exactly what he thinks the spider mythos should be within the confines of what editorial will allow than him telling good stories (not to say he didn't, but just stay with me), then the Osborn deal makes a lot of sense. OMD is here to stay, let's contextualize it. Kraven's resurrection was bad, let's undo it but leave "a Kraven" for future stories. Teresa shouldn't be a confirmed Parker, let's make it muddy. Peter didn't earn his doctorate, let's get rid of it (in a laughably stupid way and with entirely silly results). Sins Past was oh so very bad, let's make it part of an evil plot and undo the worst of it.