

Ahem, erm, technically, hah…there’s also a manga that connects the events after SC! Bet that makes you feel silly, being wrong and all. /s
Whether it’s necessary is not a matter of what the Lord and Savior Mr. Falcom says. It’s purely down to whether players will enjoy playing it. They also make Ys, and the same rule applies there. Honestly, if it was “necessary” to play Sky 3rd in order to enjoy Zero/Azure, I probably wouldn’t recommend any of the three. This even extends to my favorite series, Ace Attorney; part of what makes them great is that you can technically enjoy any of them in any order.
To prevent sounding too negative, 3rd does refine the combat formulas a bit, and adds some cool characters and moves. For me, that wasn’t enough to justify it. Mainly, I don’t want people with limited time worrying they “must” play 3rd to avoid getting snubbed by key unexplained details. Some people that enjoy that kind of extensive lore, or read every codex entry, may love it, but that’s definitely NOT what everyone plays for.
A lot of it reads as lazy DLC meant to satisfy investors that want “value-adds” without taking a lot of development time. I’d imagine only obsessive fans (admittedly, there are many) would be considering them.
But the fact that it’s a remake of a 20 year old game doesn’t seem like it would affect the value. For reference, the old one was top down with prerendered chibi sprites. The new one is fully 3D with voice acting. It’s a pretty sizable change in appearance, even how the combat functions. $60 is probably normal, though it makes sense that for anyone unsure about it, either play the demo or just wait for it to go on sale.