It does have its good points which can contribute to the game, hubson.
Early war planes offer a very different type of flying experience than compared to late war planes. The basics of combat, BnZing, E fighting, etc etc.. remains same, but the early war planes have a lot less finesse in every part of it so the fights are tougher and more intense.
Also, the early war planes are much slower overall, which means the fighting grounds in the MA actually become relatively larger. It has its drawbacks that there is a bit of more commute to the fighting area, but the good thing is, in early war planes, you can't just point down and run away ASAP.
The La-7 does about (loosely) 390mph at deck, which travels 6.5 miles per minute. MA bases are typically about 25~30 miles apart, so an La-7 in the current MA can just point its nose down and run away for 3~4 minutes, and it can get to safety. Even if you are not in a La-7, the P-51D, Bf109G-10, Typhoon and etc.etc. planes are so fast that even with a faster plane with more E, you may never catch up to him in time, because in 3 minutes the running guy will reach his base perimeters, and much more likely you'll probably meet enemy reinforcements during your chase within 1~2 minutes.
However, if we are playing in a 1940 set up with Bf109Es or Japanese A6M2 zeros, or Spitfire Mk.Is, these planes do about average 275mph at deck. If a plane decides to run away, he has to run for about 6~7 minutes straight until he reaches his home base. In those 6~7 minutes, you may be able to catch up to him if your plane is slightly faster than his. Also, enemy reinforcements are seldom as quick to reach you and kill you, as seen in the current latewar MA, because climbing rate and speed is much slower.
Also, the early planes typically have much much weaker ammo. Snapshot kills are rare. Cannons are limited to about 2x 20mms with 60 rpg, with a very short firing time. The fights are much more close quarters, intense, and last longer too.
Also, less discrepancies between plane performance with early war setups. The 1944 plane La-7, outpaces the same 1944 planes such as P-38Ls by more than 40mph at deck. Typhoons and Fw190D-9s are superbly more faster than the P-47Ds and etc etc..
In comparison, pickout all the '39~'40 planes in the AH plane set and compare its speed at deck - they are all within 25mph of each other. Each plane is different, yet there are no real 'super planes' which can be singled out and people only fly that. The A6M2 is a superior turner which is not really that slow, the Bf109E is a superior climber which doesn't accelerate or climb all that better than others, and the SpitI is a great turner with really weak ammo. Distinct differences between planes and yet all are competitive.
In other words, the earlier the era, the more fun the aircombat. Intense action, with no single plane that can just run away at whim. No mega cannon planes, no HMG loaded birds, no super climbers, no super speeders, no super bombs and rockets. It was really cool when I used to fly CT in early war setups.
People hate RPS because in truth, they don't just want good and fun aircombat. They want fun aircombat in the planes they want to fly, even if it means a jam-packed '45 arena with everyone in superplanes and running and HOing and hording all the time.