I use standalone Abbyy these days mainly because it allows me to specify more options like quality and mrc.
It would be nice if I could do all of that inside DT3 without having to use standalone Abbyy on top, if possible case by case with separate menu items.
Currently I use this applescript here that triggers through a smartrule when I tag something with
ocr_pending. It gives me a mrc and a high quality version side by side and imports both into DEVONthink so I can choose later how important scan quality is for the given document (some of them I might want to print again, some others are just for archiving so mrc is fine)