According to swedish newspapers he was offered to return to Frölunda first who declined because of strings attached that he was to recieve a big playing role.
Makes sense for Frölunda since the only thing he's shown in SHL is promise due to young age, followed up by an unconvincing NHL and AHL performance, plus their team is stacked by swedish standards.
Despite that, I'm sure he's going to prove to be an effective SHL'er at HV71. Maybe not enough to warrant a return to NHL though, it'll be interesting to follow though.
I won't make any judgement about the whole suspension and asking to be traded thing since I don't know any of the details.