Is it getting harder for tanks?

[ChameleonMS]

While enmity is certainly a shared responsibility I don't think "let any dps that rips hate die" is a reasonable mindset to take on because, as stated, it is a shared responsibility. Part of the burden is on the tank.

You are absolutely correct, it is SHARED. If you were in my party, and I saw you pop diversion for your opener, and slowly crept up the enmity ladder, then dropped again with a Lucid, only creep up again. It is my responsibility as the tank to use an aggro combo and/or tank stance to push you back down. The situation you describe is everyone doing their job.

The situation OP was describing was either trolling, carelessness, or laziness.