Yes, ionization is interpreted as thinned, extended outer surface of the atom (e-shell). No physical reason it cannot fill a room if depressurized sufficiently.
Otherwise, show me a single electron. And then use it explain the concept of charge, not quantitatively but mechanistically. What other than magic holds it in it's path?
Until then, ionization is delocalized surface of the atom because that's the only way to rationalize the idea with physical objects (aka the atom), which physics ought start with. It IS the study of objects that exist. If you consider ionization this way, it clears up the rest of your concerns & I will happily walk you through the details. If you're not willing to take that interpretation we have nothing more to discuss, eh?