Edited Feb. 20 at 6:37 a.m.. Reason: added explanatory phrase
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I think that Matt Roy is in the Kings' long-term plans, and they will give him the contract you predict for him. To keep him, they will bite the bullet and stay with the goaltenders they have now because next season's rise in the cap ceiling, Kopi's pay cut and losing Arvidsson will create enough cap space to do everything they want even with Byfield's pay raise.
Even if they do trade Matt Roy now, the roster shown doesn't work well. A 20-man roster with no cap space is awkward and Anderson-Dolan is not waivers-exempt, so he can't be parked on an imaginary "Tax Squad" unless Montreal retains 50% on Evans or Nashville retains a little on Saros.
The Kings have been getting entirely adequate goaltending from Talbot and Rittich, and Saros isn't having his usual exceptional year. As a result, I think that Los Angeles as they are now are clearly better than this version of the Kings. Sorry, but that's my take.