Agreed. If his beloved Sophie was killed, he'd be going to the front to rip apart Serbians personally, if he felt it was the Serbs who'd done it. Say what you will about the Archduke, no contemporary of his even remotely questioned his absolute devoted love for his wife.
I expect that, in this scenario, Franz Ferdinand's eventual recovery will be in no small part thanks to devoted attendance by Sophie; he'll probably be recuperating at one of his properties, most likely Konopischt (sp?) which he always considered to be his favorite home next to Artstetten Castle, where the additional presence of their children will also help his state of mind; he was always happiest in the bosom of his family. Sophie was a woman of quiet but exceptionally strong character, who OTL won the admiration and respect of Franz Josef by her dignified refusal to let the continual slights against her provoke her; I wonder if she might end up becoming the heroine of the incident in Sarajevo by her calm conduct and unstinting nursing of her husband, which in turn would raise her even further in the Emperor's esteem...
Now that makes me wonder if Franz Ferdinand might be more willing to (a) sack Conrad for his incapacities and (b) encourage the peace feelers, should war still end up breaking out.
Very likely. FF and Conrad, who had once been one of the Archduke's premier protégés, had been on the outs for years; IIRC the final breach came when FF chewed out Conrad in public over a social misstep at a German-Austrian officers' party attended by the Kaiser himself. I personally think a lot depends on how much longer Franz Josef lives. OTL there had been a serious scare a few months previous when he came down with a bad case of bronchitis, so serious that Franz Ferdinand had actually been alerted to be ready to come to Vienna. FJ might last as long as he did OTL or longer, or on the other hand the stress of trying to decide between war and peace, or manage the war with the continual bickering between FF and Conrad, might finish him off earlier.