Downhills? You could virtually spin that out on the flat. A 46t front for road riding would be too low for me, especially on a lightweight bike ridden in a bunch.
Rubbish I’m afraid. 46×11 gives 112 GI whereas elite team pursuiters use a lower gear than that to average over 60kph.
I’ve used my cross bike on slicks with a 46×11 in flat E12 crits occasionally and have always managed to figure in the sprints.
OP, I think you’ll find it will be OK as it is an even tooth jump which is what both rings will have been designed for.
EDIT: cross post with Rusty