I do want a Contemptor, or two or three
But I like Dreads, I know they have downfalls, and are rarely going to get their points cost back in enemies killed, but they force a unit or two to focus on them. They, and the pod can get in the way of a heavy weapon squad or vehicle. I know drop pods do that without Dreads in, but i've got a Dread and I like them.
Doesn't mean I wouldn't consider not taking one, but at the moment with what i've got and what I can get its probably a pretty decent option.
Yeah wasn't sure about the Sternguard load out, would require play testing on my part I just did 4 because its half the squad.
As for the tactical, it'll depend. I've used a 10 Man Tactical squad (a while ago, in 5th I think) with
BA with a Sang Priest and had them in cover, by an objective and the long range and short range worked, when there was nothing near its an extra
LC shot from objective campers, when something gets close you've got bolters and a melta. Probably not optimised, but its worked for me in the past.
I've never really had to deal with many flyers, and when I have i've lost badly. Have only ever faced 4+ flyers, Necrons and
IG. So don't have experience actually dealing with them properly.