It's only anecdotal and I still like Amazon for a wide range of products, but when it comes to games in particular, they've been pretty unreliable for me through 2016. I actually decided to stop using them for my most anticipated games, which is fine since I live in the US and also have Best Buy GCU.
That said, glad to see Atlus doesn't seem to be in any position where their product might have to be halted from shipping or recalled, which was my primary concern with this news breaking. Sorry to anyone that may have been affected, though, that really sucks -- my empathy's with you for sure, I actually moved my Persona 5 pre-order off of Amazon and to Best Buy when I started having issues with other games not shipping on time last year. Persona 5 has persistently been my most anticipated game since its announcement and the delays have been particularly impacting given my excitement levels.
That said, I don't necessarily encourage anyone to do what I do. I admit being a victim of hype at times -- not in the sense that I've particularly felt that my money has been wasted, but rather in that I seriously get so damn excited to start playing as soon as possible that minor delays have been pretty upsetting. If Amazon's your best bet, getting the game a few days late is not a really terrible thing, especially considering the discount they provide for the first couple of weeks after a game's release. Tuesdays -- regular new release day in the US -- is my "Sunday" (I have Sunday, Monday, Tuesdays off each week), and I work long shifts where I can't really play during the work week (unless it's on PC or Switch), so that really kind of drives my strong urges to play right on release day, too. It's a first-world complaint to the max, but I have access to an alternative business that has yet to let me down.