I'll wait to see what they do or not do during this period, but recognizing and admitting you need some more depth at wing, and then not addressing it is completely unacceptable. Finishing in a Champions League spot this year is an absolute must.
Don't care about Lucas, other then the fact that if they are moving on from him, it should be an outright sell rather than loan to an Italian club like Inter, which accomplishes nothing. Pretty confident Kevin Stewart can replace him.
I'd much rather play Sahko than buy a CB. If the relationship cannot be mended, then sell him in the summer. You'd still probably be more likely to get your asking price (or closer to it) under that situation of him at least playing than the one now. In other words, you're not getting your asking price with him in his current form of not playing.