Yea, I remember tanks being a bit longer to beat down stuff, but 20 levels diff, no. Even if you hadn't slotted any enhancements. Your memories are off in both directions.
My current Ice/Ice tank can sit in the middle of +4/x8 of some groups (especially council) and everything will die of frostibite if I just walk away for a bit. Don't have a fire/* tank, but they'd be fine. Tanks got over tuned actually for offense, but against most stuff, they're almost impossible to get killed.