No Structure yet so may come across little ranty.
I'm a Deathwing player and rather dedicated but terminators are bunk.
2+/5++ and 2 wounds sound good, I've played a couple of games with the better bolters rule and they're still a non-competitive choice. It's so sad that one of the most iconic units has been regulated out of competitive since
3rd edition (with a small window when you could take Deathwing terminators as Troops with storm shields in a ~6 month period between a FAQ and new codex).
Honestly, I can't think of another (squad) unit which has been so constantly bad for so long, bearing in mind there are SIX(loyalist) kits, Regular, Assault, Dark Angels, Blood Angels, Space Wolves, Grey Knights.- (I think GK may have been good at some point)
I heard a rumour that Termies may be getting +1 W and/OR +1 T (apply mountains of salt), which I think would move some only to "Usable" in a competitive sense not certainly not an auto-include.
The problem is there are far too many mortal wounds flying around, far too many 2+ damage weapons and far too many negative modifiers.
In 8th units either need to be good, probably actually OP, or contribute to command points or they're just not really worth taking. It feels like GW have been on the troops train for 3 editions and these Veterans are an unfortunate casualty that ambition, along with the aforementioned.
It's just well sad...