The resize handles are still there, just smaller (see the explanation I gave in
this message). Note that this change occurred months ago...
EDIT: you are however right when saying there has been a change in handles size... I didn't notice at first, because I mainly edited attachments these last weeks and handles are fine for them... However, the recent fixes to the "drawables" update code seem to have impacted the resize handle size calculation for my zoom-dependent algorithm... I'll see if I can get the latter back in line with what we got before, in the mean time just revert to the "normal" handles by un-checking "Advanced" -> "UI" -> "Zoom Dependent Resize Handles".