First off im pretty sure they could break out of the ice mid air but if they can't still. If they break out of the ice on the ground and you are above them they can still have options of running forward, DP, anti air move (Ragna 6A for instance), air grab (If fast enough Noel?)or block a very easy reset since you air dashed.
It would be a much better idea to just JUMP forward to them then air dash because if you air dash going low from there is MUCH easier to see. Its better to jump forward then either air dash for the high or land and 2B.
Either way im still like pretty sure they can break the ice mid air.