It's extremely hard to break someones spell concentration now. What was happening was that any spell with a cast time of more than a combat round was always broken. The problem was that the formula used did not scale at all with how the damage output of players has increased over the years. Imagine ...

That sounds like a pretty good thing for players to have to decide themselves.
Go to sparkle to get a hint or spend the time looking for the quests yourself.

Players having to make decisions is good.