My "fix" for this, such as it is, is to eliminate the need to spend a Destiny Point or take strain in order to use Dark Side pips when your Morality is between 70 and 30. If you're not a Paragon or a Darksider, both sides of the Force are equally easy to use, and have no immediate drawbacks. And because of the noted purveyors of DS pips, someone who isn't trained in the Force and therefore doesn't know the difference is likely to spend any points that come up, which will slowly send them on a spiral towards the Dark Side.
There! For unaligned Force users, the Dark Side has become much easier to use and much more tempting - easy, consequence-free Force points whenever you need them! No having to keep trying to get LS pips, especially in an emergency, they're right there! It's almost like it WANTS you to have them...
While the idea of having the Dark Side be easier and more available is a good one, there should be consequences to it. Taking strain is a great flavor way to do that; The Dark Side is full of negative energies and emotions and you get stressed out You're also using those bad emotions and negative thoughts to fuel the Dark Side.