Doesn't moving, including jumping, get you out of the small areas generated by cantrips anyway? Cantrips are incredibly weak at-will spells as it is.
When you lab it out cantrips can be pretty powerful especially in the context of EA due to the ground effects it creates; some people dislike that they scale too well and don't mirror 5e graphs.
Also by saying that jumping gets you out of the area gives a bit more weight to the argument that cantrips are too powerful as it forces you to use a bonus action. Though, I guess the same could be said about booming blade which admittedly is in a splat book(which I wish was in the game to flesh out the Eldritch Knight a bit more).
So, I wouldn't say they're weak because one can at least fish for knocking a creature prone while the other does good damage over time and has good efficiency till around level 4. The acid one is a bit more dangerous since it is -2 AC but in practicality it's going to be used on BBEG who tend to move around and out of it and without delay action it's also far harder to capitalize on.
