I see a lot of people doing quick reviews on what they see...I'll try to go a bit deeper:
CBJ gets: Provorov, LHsD, signed for two more years, at $4.75 cap hit
>>>cheap hit and $ price for a budget team...$2m of his $6.75m being paid by LA. Likely helps satisfy future coach Mike Babcock. I heard he's a big minute muncher. <<<
CBJ gives up: LA's first, 22nd overall, acquired earlier for unloading 2 UFAs they weren't going to sign, LHSD Gavrikov and starting goalie Korpisalo; and, a 2nd rounder
CBJ overall: they basically paid a second to get a longer term LHsD (Gavrikov for Provorov) and got rid Korpisalo who they likely won't sign. Total budget team deal. And other than goaltender, they stay on course for maybe making the playoffs when their major injury players return. They probably saved at least a mil/year in Provorov vs. Gavrikov, assuming they could even sign Gav for what he rumoured will get in LA.
Philly gets: LA's 1st in '23, 22nd OA, and two seconds (one from CBJ and one from LA), a young goaltender that maybe can bounce back in Petersen; Walker, a RHsD signed only for one more year, LA D prospect Helge Grans
Philly gives: Provorov, and acquire two years of cap space in Petersen that would have gone to Provorov plus take on a cap hit of Walker.
Philly gets a pile of futures, and I consider Petersen a possible future, just not an A or S tier one. Plus as it appears Philly is going for the tank, the pick futures could maybe help Philly move up in the first two rounds in the draft if they want to. A tier prospect Helge Grans (but not S tier), 21 yo RHsD with decent size and ability, currently in the AHL, maybe a year or two away from NHL...a good formula for a desirable prospect.
One think no one is talking about is if Walker plays decently as a RHsD, and I bet with nothing to lose at the NHL level they will give Walker every opportunity, they can retain on RHsD Walker at/near the TDL and flip him to a playoff team that needs such a player...NHL-level RHsD's at 28/29 yo are decent assets. At, say, 50% retention for the rest of that deal, which ends next season, he may get Philly another decent pick/future.
LA gets: dumping a total of $5.65m of cap hit this year (total $7.65m gained, minus $2m for Provorov for 2y) and $3.65m next year as Walker would have come off the books end of next season; and two minor league players...maybe Connauton could be a 7th defenseman in case of injury? Hodgson looks like an enforcer type. They both don't add up to a 3rd rounder together.
LA gives: 2nd round pick next year, prospect Helge Grans
LA gets critical cap space in a year where they (GMRB, really) needs to sign Gavrikov, the missing LHsD piece the team needed, and room to sign a much improved Gabe Vilardi, and still have room to do other things like get a 1G goaltender under contract. The 2nd is next season so while LA lost it's 1st this year, they don't lose 1st and 2nd this year so that's ok.
As a Kings fan, not looking at GMRB's career and just looking at next year's roster, I like it. Dumping a total of $9+m of cap for a 2nd and a decent prospect is pretty good, especially right when you need it. But...to be real, if McClellan is still our coach, we will still chock in the playoffs. Last year we were an upstart team that gave Edmonton a run for it's money and exposed them a bit. This year, we had an improved Edmonton with a solid Ekholm on defense and a surging RNH on the ropes in the series at Game 4...but chockers will chock.
Overall:
CBJ and LA win in the short term as they have various level of playoff aspirations (and GMRB has "keep my job I hope" aspirations)
Philly potentially wins in the long term (no idea if any of those futures turns to even one decent NHL asset but at least they got quality and quantity to try).