Not really feeling this for SJ.
I get why it would be enticing to get Chychrun, but SJ struggles offensively, desperately needs forwards with talent to fill out our terrible forward core, and Burns is still better offensively than Chychrun at this point in time.
I do not think this moves puts SJ in a better spot than if they did not make the trade at all, and depending on how Coe/Weisblatt develop, and the possibility that our 1st, even in 24 could be high, we might actually be worse in the long term. Also since we are retaining on Burns, it does nothing for our cap concerns either, assuming we do not rebuild and keep Hertl.
So while in a vacuum replacing Burns with Chychrun would be overall positive moving forward, looking at the full picture I do not think this move makes sense for SJ.