DoTs are fun when you have additional mechanics that actually play off of them like WoW Warlock's Seed of Corruption which is basically a bomb that stores DoT damage then unleashes it in an AoE when its duration expires. Heck, even simpler examples like Bane on SB SMN/SCH were fun to put to use when applicable.

Unfortunately now MNK is getting Demolish turned into a generic back positional instead of a DoT in DT so the pruning continues.