The DW "normal" marines are Veterans, and cost the same as Sternguard before adding wargear.
To me it feels like to make the most out of the new DW you really want both standard Veterans and Primaris kill teams. The Primaris marines, with their extra wounds, make up for the fact that the standard veterans are really squishy. But Primaris lose out on the sheer versatility of the standard kill team.
Primaris kill teams feel like they're best as either a long-range fire-support team loaded up with heavy weapons and and Aggressor that camps in the back-field, ideally on an objective you care about; or as a close-range run-and-gun unit with an Inceptor, Aggressor, probably a Reiver, and lots of assault weapons. In either case, they're not going to do much in close-combat, and aside from the powerfists of the Aggressor, and 2-3 Hellblasters, there isn't much ability to damage enemy vehicles. (Monstrous creatures are easy with bolt weapons and special-issue ammunition however.)
Veteran kill teams on the other hand have access to more special rules from the inclusion of terminators, bikes, and vanguard veterans, and can be kitted out in a wider variety of roles thanks to the larger weapon/equipment lists, and enjoy greater mobility thanks to their transport options.
The big down-side is that Veteran kill teams are a squad of expensive, single-wound models that is VERY easy to take down with focused fire. This can be mitigated by taking some cheap sacrificial models (boltgun + chainsword is about as cheap as you can make them) to pull off a casualties from the inevitable mortal wounds. On top of that you'll definitely want a terminator for the 2+ save vs poor-AP weapons, and a veteran with a stormshield for the 3+ invul against bigger things. That mitigates the squishiness a bit, but it means your "core" kill team is really only 6-7 models, with some sacrificial guys hanging around to die first. Not necessarily the best points investment, but it might work out?
Because of DW's high-cost/low-model list, I'm wondering if it's worth keeping an apothecary around next to one of your kill teams. Obviously they can't ride in the Blackstar (stupid Primaris keyword.... also, why TF do DW have access to Primaris Apothecaries, but not the regular ones? Try as I might, I just can't come up with a good excuse for that), but if you've got a foot-slogging Veteran squad, or a Primaris run-and-gun squad that's likely going to be taking a lot of fire, he might be worth including just to keep that Aggressor or Hellblaster alive a little longer?