Animation lock made perfect sense with the old fights and old combat system. People complaining about being locked while eruptions spawn under you are kind of missing the point of what others in the thread are saying. You were SUPPOSED to die if you carelessly used your abilities and weaponskills. Every boss with attacks that you needed to avoid had safe windows/ways of preventing death on lock.

They definitely had the ability to adjust/remove animation lock if they wanted (in fact I think that they increased it on Doomspike II at one point). Tons of single player games lock you in place while you attack, so I never really got why people hate it so much. Animation lock is the only thing that made the old fights and combat system actually work.

That said, I don't really care much that it's not in 2.0 as long as they make the combat system good and try to keep the pacing of fights similar. Everything bosses did in 1.0 had a lot of weight behind it and it made tanking fun.