I get Days Gone wasn't exactly a critical darling but it still has its fans it could have become something greater with a sequel (plus it still sold well enough for Bend to propose a sequel in the first place). Also remaking Last of Us 1 for the PS5 doesn't sounds like it makes that much sense to me personally. At least with something like Switch ports and remasters of Wii U games you can justify it with the facts that the Switch can't play Wii U games (Switch uses carts instead of discs) and the Wii U was a flop, but the PS5 is compatible with PS4 discs, including the PS4 remaster of The Last of Us 1, and the PS4 certainly was not a flop of a console (I'm almost certain most PS4 owners also own a copy of LoU1). It reminds me more of how AlphaDream made the strange decision to remake Bowser's Inside Story for the 3DS instead of the Switch (a producer on the game confirmed it was AlphaDream's decision to make it on 3DS, Nintendo didn't force them to stick to older hardware), as you could play the DS original on the 3DS already and the remake didn't really add much.
The big thing I'm hearing people speculate on is that the shake up of leadership in Sony with Jim Ryan running the company is showing quite a few negative effects. It's reminding people a lot of when Don Mattrick was still heading things with the Xbox brand (he was one of the reasons why the Xbox One had a rocky start), though in this situation I don't see Sony hiring their answer to Phil Spencer to fix things later on.
I'm honestly getting a bit worried for first party Sony IPs. I still have faith in Insomniac and hope Santa Monica will deliver with God of War: Ragnarok, but it feels like at this point if Sony could they'd just turn Naughty Dog into their only studio.