My group and I need a clarification on how Ace of Rods works.

One interpretation is that: O nce you use the lightning ability to get the additional action, you get +2 to each of your skills for THE ENTIRE TURN.

The second interpretation is that: Once you use the lightning ability to get the additional action, you get +2 to each of your skills for ONLY FOR THAT NEXT ACTION .

Is there any official opinion or any general consensus on how the card is supposed to be used?

I think you meant to post this in the LCG board as it hasn't been introduced into the board game. From my interpretation it appears that it only works for the extra action that you get this round. hence the wording

"you may take an extra action this turn, during which you get +2..."

I think the key word is during. Hope that helped some.