I agree that the reducing of hp might make it easier to make the cars more similar.
BUT, I enjoy the differences in power and handling of the different cars. I like the fact that certain cars have advantages some weeks and disadvantages other. And I really like the fact, that with more hp, the GT500s drive like GT500s. As in you can't just mash the throttle, you need to have some finesse.
If we make them too balanced, and easy to drive... It removes a lot of the enjoyment of running the different cars. If we want all the same, we could just all run GT-Rs.
About me - I will always root for more hp and/or lower grades of tires. It brings in the excitement and risk/reward for trying to achieve those last few tenths. It brings more strategy into play, including tire wear and pit stops.
To me, by taking power away, we are nerfing the GT500s. Taking the personality out of them, and making them "point and shoot."
I hope we don't end up running GT250s and GT450s this season.
I, personally really enjoyed the GT500 specs last season. It made every week quite exciting. The GT-R and Lexus might have had a slight advantage at being good at every track. The NSX was a beast to drive, and was tough to get across the finish line. Many tried it and ended up begging for a different car.

But I loved it, and as bad as it was at certain tracks, it was good at others.
This is such a big series, and I will assume that many future GT300/GT500 series will use a lot of the specs we set here. I hope we don't cause a more permanent nerfing of these cars.
Dom is excellent at jumping from one car to another, and has solid tunes for all of them. He is a great person to judge the balance of these cars. I just hope that taking away power from almost every car is re-considered.