Concerning T5, echo or not, if you take a twister/divebomb you're dead and you may kill some of your friends in that process
But the increase of DPS would make the fight easier for sure because each phase duration will be lower.

I prefer that they keep the mechanics the same personally ... at least news guys will have the same feeling that we had at our first twintania rape : 'OMG we die so much!' 'twister are crap' 'i can't dodge divebomb, i'm lagging'