I'd wait for the final results before creating yet another reason to hate Loomis based on rumor, limited info, and hypotheticals.
It could very well simply be that he wants the new HC to keep the ST coach and OL coach only. It could be that he wants a HC that wants to run the Shanahan offense and in-turn gauge their interest in retaining Kubiak, solely for continuity purposes. It could be that the rumor is completely made-up and Loomis never once said it.
We just don't know. Let's see it play out, then judge the staff once it is finalized.