2 rookies on the blueline is a little unnerving, however, I think Nikishin is not an ordinary rookie. He’ll be 24 and played against men for the past 4-5yrs. I don’t expect him to be an instant Norris contender, but I do think it’s reasonable to expect him to immediately fill a top 4 role competently.
Morrow will have a year of pro hockey under his belt next season, and I don’t think it’s unreasonable to expect him to be ready for 3rd pair minutes next season. Problem will be there is not really a suitable partner for Morrow outside of Slavin under contract for next year. Personally, I think Morrow is either a shoe-in for a roster spot next year or he’s traded this summer for a more defensively-minded RD. I don’t think they’ll end up trading him though and also think a priority signing will be a 6-7D type who can play the right side to fill in for Morrow if he’s not truly ready.
Also keep in mind the contracts of Chatfileld, Gostisbehere and Walker are very tradeable, so they could offload one of them in a package for a better D as well if need be. (Maybe with the exception of Walker, think he may have a NTC)
I have wondered if they’d maybe want to keep Orlov around on another short-term deal, to help mentor Nikishin and insulate the risk with Morrow. I believe Orlov can play both sides as well. I’d hope they’d consider re-upping Orlov before Burns at any rate.