How do we make that more reasonable at levels 3-4 without totally breaking the class fantasy that a lot of players have developed over a decade? Can we come up with a generic wild shape that still lets them tank, but a little less effectively than barbarian/fighter/paladin rather than more? And can we give them access to some of the flexibility that allows so much fun, imaginative play without removing almost all of it?
Edit: the bark skin suggestion, assuming the druid is using the new version of bark skin, allows him to live just 3-4 rounds or so against that orc, with a good chance of being one shotted if it crits. It's gonna take a lot more than that to make the druid a viable, if slightly inferior tank!
I think it would be entirely fair to make the Moon Druid an effective shapeshifting tank, and the other druids have other focuses.
And actually... would that be that difficult? Consider.
1) Let Druids shapeshift to be tiny, at level 1 this is great stealth, but druids can turn into everything from spiders to squirrels to draft horses at level 1.
2) Remove the level 5 ability and give multi-attack to the Moon Druid at level 6 alongside the Elemental resistance.
3) Allow Druids to Gain Temp Hp when shifting, equal to wisdom mod. Moon Druid gains equal to mod+level x2
4) Shift the Aquatic form to level 3, and allow land form to climb, flying form to level 5.
5) Have the Damage dice increase with level. Land tops at 1d12+wis, Sea at 1d10+wis, and Air at 1d8+wis
6) Give new abilities to fill in old spots, and give the Druids more versatility in concept.
So, with this, Wildshape is a utility feature for most Druids. Land Druids and such can turn into animals, get a little hp, but it isn't their combat move. They can use it in combat, but it isn't terribly effective (action to activate, only as good as a cantrip in terms of damage, little bit of temp hp). Moon druids at level 3 get a big boost to temp hp, can shift as a bonus action, and quickly get a multi-attack like melee characters. Keep the minor casting of abjuration spells, and you have a Druid who is a melee combatant as their subclass focus.
This... isn't terrible to my eyes. I'd still take Blossoms and improve it, and I guess the Familiar is
fine but this would solve a lot of issues for me.