I've watched it back a couple of times too now, and whilst Dysart Dynamo wasn't getting anywhere near Constitution Hill, I'm not buying the argument that he would have been beaten by Jonbon. He didn't strike me as legless. Perhaps he might have been beaten by Jonbon if he'd stayed up, but Jonbon was off the bridle too and had a lot of ground to make up. Constitution Hill simply blew them away in the manner of the most exciting novice for a very long time. We already know the time was much quicker than Honeysuckle and hour later, but ignoring that, Jonbon himself put up a time that would have won most of the last 10 Supreme's, and likely Dysart Dynamo would have done similar so he really shouldn't be written off.
What's interesting to me now though is what might happen next March. Given he's such a choke out type Dysart Dynamo will surely be aimed at the Arkle with El Fabiolo. I don't see Willie stepping either up in trip. DD just wouldn't get home over further, and El Fab is bred to stay at the minimum. Tactically you'd assume Dysart tries to make all from the front, and Jonbon and El Fab run there own race against each other with the assumption that they finish strongly and beat Dysart. Fences make the Arkle slightly easier to get home though, and I've though for some time that Dysart Dynamo is the value antepost Arkle bet.
I agree that Jonbon is too short now. The Mullins pair will possibly get there with unblemished records, plus there are others to consider from Closutton too such as Flame Bearer who has been talked up, and Appreciate It who could also stay at the minimum, so Jonbon could trade at bigger at some point. I build antepost books and take the earliest prices, but for most people who were sufficiently impressed and fancy Jonbon, surely he's just a wait until the day price. Would anyone genuinely consider backing him right now at 2/1? I doubt it. I'd say the right price is more like 3/1-7/2, and the 7/4-2/1 is just a further indicator of how defensive the bookies are with antepost prices these days.