An Aegis has a far bigger problem in 5th edition: it's very easy to tear down for any Hermetic mage (or other entity capable of producing similar PeVi effects). At that point, it becomes far less of an issue whether enchanted items can "get around it".
Incidentally, it's worth noting that an Aegis affects (but does not warp) everything within it, including random pieces of masonry. So, a magus with a sufficiently strong Parma has a "pink dot" defense against any tower collapsing onto him.