Originally Posted by
zenga
Where do you get that number from? Because it is not correct. Flametongue currently provides 1k extra spellpower that doesn't scale, it's a flat number. Ele shaman spells don't scale too well with spellpower either. Getting 1% extra spellpower doesn't mean your damage will increase with 1%. It depends from spell to spell. Spell power coefficients are unique for each spell, and they basically contain the factor that your base spell damage will gain from extra spell power; for lightning bolt it's for example 91% and for chain lightning 77%, meaning that the lightning bolt damage profits more from extra spellpower than chain lightning does.
The change to flametongue makes it scale with everything (bar fire elemental & searing who are afaik considered physical attacks), since it's a flat 7% damage output buff (2% extra from talents). In my raid gear (mix between bis heroic and bis 378 gear) I would already profit from the change as far as damage from spells goes.