Bickell was waived, but no one claimed him - technically he can be sent down without going through waivers again I think - I think that the only reason that he is playing is to continue to (maybe in vain) showcase him for some hoped for trade - probably also the reason Pokka is on the NHL roster ... I think - but who knows - I only know that no one wanted Bickell off of waivers -which means if they do want to move him sooner rather than later it has to be with some additional incentives.
Personally I don't think he has a role on the team any longer - and his hit could be better used spread around. Granted he played most of last season in the lower 6 forward groups, which would limit ice time -but he never really did a lot of anything to stand out even down there - sure he hit a lot of guys during the playoffs and then got vertigo ... not exactly recreating anything near 2013's run ... not a 4 million plus dollar guy really.