#1 is surely not my favorite, but it gets the player to a better hole at #2 and the 3rd tee where the real fun begins.
As for #18, I've never loved the tee shot (it's a forced draw for longer hitters), but I like the approach to the broad area near the first tee out in front of the clubhouse.
They are probably the weak links of GW (#13 probably was before due to conditioning, but that's been fixed), but I compare it to many of the old country links where 1/18 are somewhat benign to get the player from town into the fun and back. There are plenty of the world's great links where 1/18 are the weaker holes...TOC, North Berwick, Prestwick to name three!