Bladed spokes
 

I noticed DT makes some bladed spokes......How do these compare with 2.0/1.5/2.0 spokes for elasticity.

Would they be a good choice for a 36 spoke spoke wheel. I know they are heavier.

Also since they are direction I guess all adjustments have to be made in 1/2 turn increments...is that a problem when tensioning. I'm a newbie at this.

The round spokes have more "spring" The aero spokes are also about four times as much as the conventional spokes.
You would still true them like a regular spoke. You really need to hold the spokes to keep them from turning, aero spokes will really twist up. I use a hardwood dowel slotted to hold the spoke works good and it is cheap. There are also some third hand tools modified to grip spokes on the market as well.

I dont believe they offer many advantages, gerd schraner discusses them in his book

I tend to agree.

Heavier, less elastic, harder to build and true, and (arguably) no aero advantage.

Don't bother.

Oh, and more expensive.