I think Blough was indeed not just on their radar, but highly thought of, as a guy being groomed to be a future OC.
But you can’t seriously believe it was Plan A that he be promoted so soon. Meaning, the jump straight from Assistant QB Coach to OC wasn’t the planned route to take. In an ideal world he would’ve kept cooking for another year or two, maybe gotten experience with another position group like McVay or at least spent a year or two as the full QB Coach.
Clearly, we don’t live in that ideal world and things went downhill with Kliff after a tough season and outside interest in Blough (for an actual promotion we couldn’t deny) was greater than expected. So we jumped with him early.
But clearly no franchise would PLAN for their OC succession to run through the Assistant QB Coach position. He only technically got a little experience as the full QB Coach because Pritchard bailed a little early for a college job. Otherwise, promoted straight from Asst QB Coach. Clearly that wasn’t their ideal path for him, but it’s what happened.