Getting 6/7 worth of stats for 6 mana and 2 cards, 3/2 of which have Charge sounds like a par-for-the-course deal on Arena and a horrible deal on Constructed to me.
It's not just a 3/5, though; it's a 3/5 that your opponent has to remove, or you have the potential to get insane value the next turn, like with Brann or Violet Teacher or Naga Sea Witch. And dealing 5 damage is not trivial for most classes.
Dealing 5 damage on turn 6-7 is pretty trivial for most classes, as evidenced by how often Emperor Thaurissan survives the opponent's turn.
3/2 charge for 2 doesn't sound like the best use, but this + Living Roots/Raven Idol/Wrath mid game sounds good enough. Late game, Druid of the Claw for 4/6 Charge Taunt sounds pretty cool.
At worst it's a pseudo Sen'jin. That's not the best card, but it's certainly okay. I expect it to see play, but I don't think it'll be format-defining in the same way FoN + Savage Roar was.
This+Raven Idol is very good and this+Living Roots is fine but not amazing. This + Wrath is really struggling to be even good enough, it's two different cards that you need to have in your hand to get what's basically a Fire Elemental except it deals one extra damage and has 3 less Attack. Druid of the Claw is the weakest possible interaction; Charge and Taunt are very redundant, and you'd much rather play the DotC in the mid game rather than save it for the late game.
Even the regular Sen'jin is pretty crappy in Constructed, and a pseudo Sen'jin is way worse if you don't actually have any of the good synergies. I expect people to try to make it work, but I don't expect it to become a staple in regular Druid lists and I don't think that lists centered around it are going to work very well. On Arena and Tavern Brawls, it can be situationally awesome, and it has the potential to become very good in Wild when future choice cards are released, but as it is, I super don't think it's going to make any very competitive lists in Wild and I'm cautiously pessimistic about how much it's going to see play in Standard.