"It's quite a significant movement bringing Allison back," said Slater on the Sky Sports F1 Podcast before Elliott's departure was confirmed. "Especially when you have promoted someone to a theoretically higher role.
"The rearrangement at Mercedes over the last two years, not saying Lewis was negative in any way in 2022, but there was a kind sobriety and restraint about the way he would speak.
"And I sense now, he's much more on the front foot again. I think he feels that yes, the building blocks and the right people are in place, in terms of where the car development is going.
"That little quote I made was almost, was that in reference to Mike Elliott, or the engineers who want to go a different way from the kind of Red Bull path that Mercedes have now adopted?
"But you just get the sense, Lewis feels that at least the right personnel are in the right spots with Allison in the lead.
"It's just can they set the targets and parameters right now and are Red Bull just a little bit too far ahead? Is [Adrian] Newey beatable on aero over this winter? That's a big question."