If you mean +1 in that it turns Tier 1 Druids into Tier 2 Characters, yes. Since 5 levels of Druid are essentially required to take the class, it's really only downhill from there.
If you apply it to a Wildshape Ranger, then it could easily slip to Tier 4. Wildshape Rangers waste the divine casting progression and the free quickened spells, and the Sneak Attack gained from the class is far inferior to the Skirmish dice the Ranger could get by simply taking more Ranger levels with Swift Hunter. They're practically mandated to take a level of Scout to qualify, even. It's possible that such a grim fate could be averted with an Archivist or Cleric dip, but at that point we'd be making an overly-complicated Druid Wannabie.
Daggerspell Mage isn't much better. The capstone sells itself as the ability to cast while making a full attack, but you should be reading it as you are able to make a lot of weak attacks in melee while casting one of your Armageddon spells, and then not follow it up with a quickened spell. As a result, I'd say that it easily drops Wizard and Sorcerer bases to tiers 2 and 3, respectively. If added to a Rogue base, however, the resulting character could probably raise their stature to tier 3.