Sure, as for me - I don't need any toggle
One good working engine is enough.
Concerning "complaints about mixed-in English text" - if you remember I didn't asked for this
All I asked is to make the green box movable (and I'm not alone in this even on the forum) - it will serve most purposes.
You converted it to "mixed text" task, so I just accepted your vision (though I think that "make movable" is more easy task to do).
And use-cases I described above are common for most learners (at least for all beginners) so it's not something rare. May be very beginners just cannot get how to use current OCR for their tasks (I hope coming flashcard auto-creation from OCR-sources will make it more clear).
And the OCR functionality is still usable for described use-cases - it's possible to move the box by resizing, but just isn't convenient. So it's not a new future request, just a question of usability.
BTW, as a new user of Pleco and the very beginner Chinese learner, I don't see any signs that you trying to understand and make much difference between beginners and experienced learners/users
I think creating just two bundles (Basic and Pro) are
not enough. But it's another thread, if you interested - I could explain my thoughts as a new user.