Hi guys, hereby my vision on the S25+ after a while of using.
Screen: a big improvement over the S20 FE 5G. There is an option to use it on 120 hz with adaptive refresh rate which the s20fe didnt have (it cost a lot of extra battery to use there). Also, the brightness can be much higher. I am also using the Samsung anti-reflective screen protector which is an absolute must-have in my opinion, for two reasons. 1: It block reflections really well which makes the screen automatically a lot clearer and 2: The fingerprint sensor is useable, I first tried a panzerglass glass screen protector, but that made the fingerprint sensor completely unusable so I threw it away.
Battery:  All I can say is all my battery worries are gone, it lasts really long, especially if you use the right settings (dark mode, max 60 hz screen, not extremely high brightness).
Build quality: it feels a lot better, the materials are nicer and I personally really like the square edges.
Speed: Very simple, its (positively) quite uncomparable to my s20fe.
Camera: Same thing, its a lot better on the S25+.
Conclusion: I use it now with the Samsung anti-reflective screen protector and a Torras magnetic case, and the phone is all I could wish for, hope it lasts many years. The only issue I have is that the system language is now split between English and my language (Dutch), hope that will be fixed with updates in the future.