If he is not ready for the SHL, why do we want to put him in the AHL? I think dropping down a league or playing in the CHL would be better for him.
However, working hard to get back into the lineup may also help his development. A little perseverance never hurt anyone.
Overall competitiveness is pretty similar, but the AHL has the added benefit of truly being a development league vs. the SHL where teams can face relegation. There's more at stake.
Also, while the 'talent pool/ceiling' may be higher in the AHL, the SHL also doesn't face near the turnover that the AHL does. Team unity and system play are quite a bit higher, and the veterans are considerably more crafty.
I think the reason you don't see many Euro players jumping from the western Euro leagues to the AHL is mostly because you're adding the element of uprooting a young player when they may still be 1-2 years out.
The nuclear option here would be to bring him over to the AHL after the WJC, assuming he performs there. I doubt that's their preference considering Steen's role is about providing guidance to our Wester Euro players. That said, with IK Oskarshamn potentially facing relegation with how putrid they've been, I don't know that there's a path for Dvorsky with the team. He's viewed as a high risk player, at this point, and Osk is not in a position to take risks.
I agree that it would be ideal if the team/player can work this out; however, the circumstances here aren't the best. I expect we'll see him moved to Allsvenskan, soon, and the situation will be reevaluated during/after the WJC.