I rolled a damage dealing spec character on game launch, and had very little issue finding groups for pretty much all heroic missions on planets over the course of 3 weeks of levelling. But now that the population has died off somewhat, it's near impossible to find groups for Heroic missions, even so on either of my tank and healer alts which I find surprising, as it's apparent it's not a shortage of roles. I have left Balmorra with 6 Heroic missions in log (stayed around for Bonus series too), and Nar Shaddaa with 4.
If Bioware don't plan on doing server merges, should Heroic +4 missions on planets be downtuned to Heroic +2 difficulty, and perhaps a few of the existing Heroic +2 missions downtuned to solo?
Some Heroic 2's can be solod already with a well geared companion and skillful use of all the skills available to you.
But in short: No, I don't think so. They provide decent rewards usually (either blue/orange gear) and shouldn't just be handed out. None of the heroics are required either. They are there to let you challenge yourself/find a group to beat the "heroic" but by no means are you required to complete any of them to move on.