Your idea of "morphogenetic fields" is fundamentally incorrect; re-read the wikipedia article you linked to, the word "electricity" doesn't appear in it at all. It's talking about "fields" of chemical gradients which control the development of tissues; that kind of idea has been established developmental biology for over a century.

Meanwhile, in terms of the parent article, yes- it turns out that "bioelectricity" is an important part of the embryonic development. But this is not at all serving the same role as DNA; DNA stores durable information, whereas these fields are being used for, essentially, intercellular communication. I would think that the fact that the researchers successfully replace a frog's entire brain, for developmental purposes, with a simple tweak to an ion channel, pretty clearly demonstrates that the amount of vital information being carried this way is minimal.