Picking up the Lulu was just CLG being hard-headed. Like this is the way a "protect the carry" comp has to be played so lets play it that way. Who cares about the meta.
Ezreal is so strong right now that you could go Ez instead of Lulu and still have the protect the carry comp. The poke from the Ez is so strong that it deters people from going in on the carry or going in period. If the entire enemy team is down on health (from EZ poke) Jinx could still 1v5 them and if the Jinx dies you still have an OP carry.
The analysts and coaching staff on CLG just seem to be doing a piss poor job in keeping up with the meta and handling their P/B.