Thats really how quick you adapt to using manual clutch and H-shifter. The G25 doesnt make you faster, just enhances the experience, infact it made me slower because I dont use auto-clutch.
If you play racing games a lot, then I recommend it. If you dont then I would stick to your current wheel.
im faster with my g25 than old momo. g25 has much better statistics. and shifting with clutch gives you much better feel in engine brakings etc. if i am same situation as you now, i would buy g25 straightaway
I would say chill until the fanatec 911 turbo wheel is out and see how that fares . It´s a bit more expensive but judging from the beta wheel I expect it to be a lot better overall as well.
If all goes to plan people should start getting them this week or next week latest.