I mean, I really thought Howard was going to be our 4th-best starter, and, if not that, certainly our 4th-best bullpen arm. But whatever his lingering issues, mechanical or physical, obviously this season's rhythm hasn't served him well. He's gone from alternate site to AAA starter to MLB bullpen and back to starter. The remaining options are Falter, Sanchez (now apparently the #1 spot starter not currently up) or going back to Moore or Anderson. I assume he won't make a regular start in SF, but then they'll need to account for the doubleheader in NY. And they are keeping Falter on a starter schedule, which does make it easy to if they want to go with him, but at that point you are probably just flip-flopping the roles, not sending Howard down.
I do wonder what will happen to Moore, he either has to come back and be in the bullpen, go back on IL or get DFAed before the end of the month. And who knows what their intention is with Anderson.