In my experience, the above post doesn't hold true for me.
I have a frenzy barb this season - guil, highlords, eth death cs, forti, grief pb, loh, soe, raven, gores.
I'm able to do any area in the game (although I haven't solo'd baal much) with ease including killing diablo in under 15 seconds (if not less). I haven't done uber trist however.
I do get the lag/ 'rubber banding' effect and that is new and highly annoying this season. I chalk this up to lag spikes. Very rarely - perhaps one in 15-20 games - I get into a mode where my hits won't register, my BO won't increase my life and I can't TP out, but monsters will continue hitting me and my merc will be able to kill them. Usually that effect goes away after a minute or two or I just exit and rejoin the game and it is good. During those times, typing '/fps' into the game will not show anything out of the ordinary - ping is ~50-100ms.
So, yes, this new lag/ rubber band effect absolutely sucks but it is nowhere near making my frenzy barb unplayable.