Are you sure it was wake turbulence? A DC10 is a heavy and I suspect that in AC's COM it would probably say to do a missed and try again in case of wake turbulence. Wingtip vortices sink and the approaching plane ahead would be descending so it would only get more hazardous to continue the approach behind a heavy if you experience even light wake turbulence. What you experienced could probably be considered medium turbulence. Even if the approach wasn't destabilised I don't think the pilots would have continued in wake turbulence, AC has a good safety culture. Perhaps it was just wind shear or some other type of turbulence?

I have a CPL with MIFR and IATRA and nearly qualify for an ATPL but I've never approached behind a heavy or flown a jet so I don't have first-hand experience from the cockpit on this issue.