When the C Hog was perked, it was one of the fastest planes in the arena. There were no LGay7's, Doras, G10's etc. You could run like a scalded dog, with only the Runstang to worry about. The Typhie could be outmanueverd, if you flew the C Hog well, and a lot of people did.
The 20mm's made mincemeat out of a Panzer, one pass, one pop.
There were no Flack Panzies.
The Pony D was the LA7 of it's day. And the C Hog was extremely competative, that was why it was so popluar.
The arena has changed. You now have G10's, Doras, LA7's and Pony's, Spit 14's, Ki84's, these are all in plenty and will run you down, outclimb you, most will out turn you, they make you turn and bleed speed, and then get gang raped.
The Panzers now laugh at Hizooka's (as they should), Flack Panzies are gonna blow you out of the sky.
There is no longer a reason to perk the C Hog past maybe 2 points, if at all. Maybe just for tradition? They were once a terror, now they are except for the hizzooka's only average.
The F4U-4 would be more popular if it were unperked, as it would be quite competative. But it still won't be as good as the LA7 by any means. Again we may see more Hogs in the arena, is that bad per se? You will IMHO not see the usage reach 20%, not even reach the usage of the LA7 or the Spitties, they probably reach 25+% for the Spit5 and Spit9 combined. No one wants to perk the Spits, and for good reason.
As for perking the TA152, well it is just rediculous, the usage would only rise slightly. It really isn't a MA ride, sure there are always a few that will tear up thing with it, but most can't use it to it's advantage. I think is is a good thing be add more diversity to the plane set usage.
The Tempest is a real monster, you have to perk that one.
Any change in the perk system if any should add more freedom and choice, not more restrictions.
I would say that we only perk the Tempest and the Jets.