Every edition has many issues but imho 1e is pretty terrible by modern standards.
On Animal Friendship, see my comment about balance: Who cares. The bear is taught three tricks and kinda hangs around, the druid doesn't get to control it. How many "friends" would you take a bullet for?
Still a problem? Get rid of the bear and see if the player wants to skip leveling their druid for three weeks and play a different character while their druid trains a new one. Time passes in real-time when not playing in AD&D and the bear will wander off after three days if the druid leaves before it's fully trained. If the druid wants to try taking a half-trained bear along on a hike, make it more trouble than it's worth. Playing AF like this is really fun.
Every edition has issues but AD&D is pretty fun by modern standards.