Strongly suspect that this was not the work of the usual Everyman ... No rhyming, no alliteration, no linked pairs as far as I could see. Also much trickier than most weeks ... for me, anyway.
25A really needs a hyphen between resistance and shunning IMO.
LOI, 5A, due to its counterintuitive synonym.
COD 27A due to its perfect homophone (which reinforces the suspicion that the regular setter is on a break!).