I actually look at him the opposite way, at his price he's very easy to switch to in round 3 if his role holds up in the real stuff with Mills and Papley playing and Rowbottom playing a full game and he scores big in that role. On the flipside you've got very few options to go to from him if his role remains the same as last year, which was already wing/HF with some midfield bursts.
I love him as a player and think he can push towards 95 without a role change but that wouldn't be enough at his price point.
Realistically have 3 trade corrections now and can even go early if it looks like it's needed in round 2.
Ultimately I'd rather take the 3 guys with similar scoring potential/value and confirmed roles than gamble on Horse