Not only will it give a good buffer but it gives you more options in how you play, throw it down early and just fight the tempo directly or bait them into over extending by holding back the Finks
Id expect to see Dakkon make appearances in Esper control shells, as well as Esper Stoneblade, should that deck become popular
When you do so, they are much better than most mana rocks for casting multiple spells
Spoiler alert: Commander 2016 is filled to the brim with all sorts of interesting new mechanics and cards
In quite a number of decks, Id be considering Summon: Fenrir over playing other ramp spells at two or three mana, but then as someone that liked to play Beanstalk Giant for similar reasons, its not hugely surprising
Similarly, you can respond to activations of Planeswalkers like Karn, the Great Creator, rendering them useless