I don't really see the Blues as being in cap trouble, unless they have an internal cap that prevents them from going to the actual cap.
They have over 12 million in cap space left to retain Tarasenko, Allen and for room to call up a few entry level contracts.
It doesn't look like they'll be buyers in Free Agency this off-season, but I don't seem them being at risk of having to cut players unless ownership wants them to get costs down.
Depends how much Tarasenko makes. There is beleif by the hockey writers in STL that he will be a 8+ million cap hit starting next year. Add in their other RFA's and they are out of cash with less than a 23 man roster. But this all has to pay out and will.