There is an alternative to the perk/ENY system where players can all get the planes they want but they 'pay' for using the perk rides in TIME.
This is done by 'layering' the aircraft availability list per field.
Each country has only one or 2 'big' fields WAAAAY back in its rear area that can spawn these aircraft (me262, ta152,me163, arado,etc).
As airfields get closer to the front line, they lose availability to use the later-war aircraft.
Hence we would get the first layer of fields at the very front line to be composed entirely of early and early-mid-war aircaft (1938-1940 planes), the airfields located behind the early fields would have mid-war aircraft (1941-43) and the layer of fields behind those has the late war aircraft (1944-45). Finally, the fields farthest from the front have the perk aircraft. Of course, each field will have the aircraft list from the previous layer (aka mid-war fields will have early war planes available as well).
As a country captures airfields from the other side, they gain the field list as-is (aka if they capture a mid-war field then they get to fly mid-war and early planes out of it).
This allows for the defending country to have an advantage in aircraft quality while at the same time the attacker has an initial disadvantage (defenders can up quickly in later-war rides and have shorter time to target while attackers have longer time to target and their closest fields can only up earlier war aircraft.. UNTIL the captured field is up and running and can spawn planes that is).
This allows for a better control of perk aircraft and late-war high performance rides to prevent them from dominating the game. For example the LA7 would not be as prevalent on the front line since its got short legs..and anyone wanting to fly the La7 will need to fly it from 3-4 fields behind their own lines (stopping for gas at some friendly field before reaching the front). Same with a me262.
It does NOT prevent anyone from flying any aircraft.. it merely controls the presence of the higher-performing planes by time-to-target. And if you think about it.. if you flying an La7 3 fields away to a fight, its probably not in your best interest to HO the first enemy plane you see or go suicide charging red planes.. we may see a lot of higher-quality dogfights with this system.
