I have plenty of experience with seroquel and noticed after the first month or so its gets a lot better in terms of always being groggy. You'll still want to oversleep, and will still be slow in the mornings, but it wasn't till after around a month that the zomby feeling started letting up.
However it will always be there to a degree. I was on a much higher dose of seroquel for wds, and it was interesting that even at 500mg I still felt "stimulated" from the wds alone. Even though I could feel the seroquel the adrenaline from wds during the day would overcome it and give me energy.
Once the wds went away, I started getting super groggy and spaced out from it, and after about a month of building tolerance things got better. What never did get better however was my ability to wake up in the mornings. Which is why I got off it after 3 months. It was only prescribed initially for wds anyway, and I didn't wanna stay on it any longer.
But seroquel IS great for sleep if your in wds. Benzos tend to not leave me with hangovers, but seroquel is also not addicted in any respect like benzos, so you can complain about the hangovers now with seroquel, or complain about wds 6 months down the road when you try to get off benzos.
I know that feeling very well, but if you keep at it for a few more weeks you will see it starts to moderate a lot. The spacey feeling eventually went away and I actually felt just calm most of the time instead of zombified, EVEN AT doses a crapload higher than yours.
And the thing with 25mg is its such a low amount, that it will take your body longer to adjust to it believe it or not. I think because I was so much higher my body was forced to "adapt" and the seroquel became much more beneficial at that point for anxiety. Its just the sleep that never really improved.