Hmm you still cant book standard class seats on the new train well on the 22 June you can on the 13:30 Cork Dublin for some reason

Yes you can pick your seat in standard class, still its not right it since the locomotive is the other end, coach A is the first on a CDE and its on the Dublin end, coach A on a MK3 is at the Cork end but they appear the same way round on the website
You can now pick seats on Mk3 services too and they are correctly laid out