Flynn being the last totally makes sense.
I usually like to give another way to play (you do you, ofc x3):
1. TJ as it introduces the group, its traumas, and the tensions inside of it. It's also imo a good choice for the 1st route because it's not that creepy, there is no surreal.
2. Carl. Now that the group is introduced, I think it's time to play the route that has literally no connections to the other routes xD. His route focuses on him and his ancestor while being totally separated from the main storyline.
Carl's route is creepy, a little sad, but especially "WTFFFFF".
3. Leo. Leo's route is something different. It introduces new elements to the story (the Hysteria, the Hum, etc...) but they're not explained and therefore you're left to ponder things. Besides, Leo's route is also scary as shit.
4. Jenna. Now Jenna's route is not THAT scary (except for the dam scene that I LOVED). Jenna's route tells you a little bit more about the "elements" introduced in Leo's route (The Hysteria, the Hum, and... the Socketman ;P), allowing you to draw conclusions, but you're not quite sure.
5. Flynn. I think Flynn's route's motto could be "Mixing everything". Because it does. It mixes the group tension AND the terrifying elements, but most importantly, it reveals everything to you. It all comes to you in one, last, showing scene, in which you're left to cry, unable to do anything. Flynn's route combines extreme sadness, fright, and wtf-ness.
I don't know if I make much sense in this message tbh, explaining all this makes my English go crazy xD
Thanks! Means a lot :D
(My Frenchy ass is satisfied lmao)
Well, TJ's route indeed remains a little scary, and you're right, less paranormal doesn't equal less scary (in fact, in most cases it means SCARY AS SHIT XD). But I guess I was so hyped and terrified before playing Echo, and I was expecting mind-blowing shit, and it's not what TJ's route gave me. If I hadn't played this route first, maybe it would have creeped me out more ahah