I think Kings fans underestimate the value of Kaliyev. He is only 23. has played 188 NHL games, has a .38 PPG average and has consistently improved his 2-way play. Additionally he is a known hard worker who is very passionate about succeeding within the NHL and making the adaptations and changes needed to do so - and can currently be signed at a low AAV. There is a reason Pitts inquired about him, as have other teams.
What he is not, unfortunately, is a good fit for the Kings style of play and likely will never be a great 2-way player, but will be good enough defensively not to be a liability. That said, there is no reason why he cannot surpass 20 goals a season and become a PP specialist within a more offensive minded system.