I've been composing in 6/8, and come up with this, but the notation I've used looks a little messy and it's not something I've seen used anywhere else, is there a better, perhaps easier to read way of notating this (e.g. by converting the notes in the left hand into groups of 4 sextuplets and writing it in 4/4): 
... Or is this acceptable as it is?
Without any more context, the snippet in your OP "feels like" it is really four beats in a bar, with the left hand playing triplets. But almost everything in your notation contradicts that visually. The main purpose of music notation is communication, and this disconnect seems (to me at least) to be a major communication failure.
If you really intend this to be a complicated cross-rhythm, then your notation is fine - though adding a few accents might make it clearer.
But if you actually mean "four beats in the bar", then write it that way.
I don't really see how splitting each bar into four and using longer note values would make it any clearer. 32nd-notes and/or triplets won't "frighten the horses," so long as they communicate what you really mean.
My recommendation is to quadruple your note values, and write it in 6/8. That is, the first 6 32nd notes become one measure. If the music is supposed to be fast (which is the impression I get), then let that be reflected by the tempo mark.
