Moreso than a big dollar amount or cap hit, I don't think we can afford the term that any TOP UFAs will receive. Need to keep some cap liquid for Kucherov and Point extensions.
The UFA pool of defensemen is shallow enough to necessitate a trade if we want to improve on that front. I wouldn't want to lock in long term on any of the defense likely getting the biggest deals this offseason (Shattenkirk, Alzner, Stone, Kulikov, Smith). Beyond them are a bunch of guys with issues as significant as any drawback Sustr or Koekkoek have (Campbell, Franson, Despres, Beauchemin, Tyutin, Daley, Streit, Hainsey, etc.). Overall I hope we don't sign any UFA defensemen unless it is a dirt cheap reclamation project right before camp starts to push the aforementioned Sustr and Koekkoek in to competing harder for their jobs.
I am much less worried in our ability to add a complementary winger or two out of free agency. Again, I don't think term will allow Yzerman to be in on any of the top guys (Oshie, Radulov, Kovalchuk). But below the top is a wide variety of wings with warts that could fit in on a one or two year deal. Marleau, Vanek, Williams, Sharp, Stafford, Jagr, Iginla, Doan, Eaves, Vrbata, Versteeg, Hemsky, Gagner, Boyle, Kunitz, etc. Re-signing Gourde, adding a decent depth forward, and signing all the RFA's should be the easier part of the offseason. Measurably improving the defense beyond what we already have seems the biggest challenge.