Every time something gets changed people ask for a respec and the answer is always "no". My favorite example was the assault logi from a few months ago, where the Caldari logi suit had the ability to get insane eHP and became the standard combat suit for everyone, regardless of their intentions to fill the support role.

When CCP nerfed the logi suit back into its support role people demanded a respec and the rest of us laughed at them for wasting SP on an obviously broken mechanic.

What I'm getting at is, put your SP into what you want to do, not what is currently at the top of the metagame. If mass drivers, a weapon not seeing much use right now, are what you find interesting go ahead and invest SP there. They'll be rebalanced back into relevance eventually, and you can still have fun with them until then.

Plus even if you do throw SP into the current flavor of the month it's not like that SP is wasted. There's no cap on how much SP your character can have, so you can always get the suits and weapons you want later. Plus now you have whatever item you had before to use until then.