I'd say that's infinitely more likely.
When Frank was promoted from within at Brentford, he was simply following an established model that had already brought them success and he brought continuity to that.
The people pointing to that example as evidence that it might work with Eckert appear to be ignoring the fact that what we need right now is the opposite of continuity from the previous setup, otherwise sacking Still was just a pointless, knee-jerk reaction.
We need someone to come in and make an instant positive change to our playing style and coaching setup, and Eckert is absolutely not that person, regardless of what potential he might have.