Hi,
Absolute NO---.
First they need to know and understand what the 5th gen is about---. Once they have the ability to understand procure utilize---then they may start to think of the 5.5 or the 6th gen---.
You have to understand this---they onl;y let us know what they want to---. So how can you compete and beat them when there is no open knowledge about the 5th gen aircraft---.
We are still living on the gossip market---.
The 4th and 4.5 gen are open secret--the F16's and f15's---and yet there is no aircraft in the world that can compete with them today---.
3rd Gen - focused on speed
4th Gen - designed for maneuverability, high Gs, turbofan engines, FBW, composite usage, powerful radar with BVR capability (eventually)
5th Gen - Compromising on maneuverability to get shorter wavelength stealth
However, technology doesn't always progress linearly. Sometimes there is a step back. For instance, F-16s have a lower top speed than F-4s. F-35s have an even lower top speed and cannot break the sound barrier for more than 30 seconds on afterburner at a time.
So, there is some kind of compromise. I believe that a full stealth fighter is also going to take a step back. We already see this - F-22 is stealthier than F-35, F-35 tried to compromise by having a less stealthy airframe. Similarly, Su-57 is less stealthy. The French decided to induct an s-duct for stealth but didn't go for internal weapons bay on the Rafale.
I think 5.5 Gen could perhaps be a step back. Having aircraft that are hangar queens (like F-22), that need to be kept in special air conditioned hangars. That is not a combat plane to me - it is a joke. A joke that costs 5 times more than a conventional aircraft to maintain.
This is why USN is buying Super Hornets and USAF is desperately buying F-15s and trying to maintain their legacy F-15 / F-16 fleet.
So, what could a step back 5.5 Gen be like?
This is the question that Azm has to answer. It has to be a compromise, somewhere half way between an F-35 / F-22 and an F-16 / F-15. Perhaps an S-duct like the Rafale and semi-recessed weapons - a happy medium between an internal weapons bay and carrying the missiles on pylons.
Since laser tech has had massive steps forward - it could have a laser weapon instead of a gun. This could act not only as a weapon for a close fight but as DEW - the new hot topic in tech circles -
destructive electronic warfare. Consider this - an AESA radar and other electronic systems are highly sensitive equipment. When you point a laser, even at range at it - they will not function efficiently and the laser may even create permanent damage to the systems.
This is the tech frontier territory that a team building a 5.5 Gen fighter has to consider.
Another factor that may change is basic aerodynamics. Just as aerodynamics changed from MiG-15 to MiG-21, F-5 to F-16, F-16 to F-22 - the basic aerodynamics are evolving to meet the challenges of the expected combat profile.
We are moving from the EM Curve gold standard to a new kind of war - fought at higher altitudes and higher speeds. Something that the F-22 demonstrates, as well as the Eurofighter and Su-57. The aerodynamic characteristics they represent are larger wing surfaces - for greater lift at high altitude, where the density of air is lower. Thrust vectoring controls, that also help the same. We are also seeing greater wing-body blending in the Su-57 and F-22, which again helps at higher altitudes.
Russia has clearly seen the bunny on this one, and you can see the development of the Pakfa already along the lines outlined above. They are showing less emphasis on stealth and greater emphasis on the BVR Hi-Hi battlespace.
The J-15 would not be outdated in this move towards a new doctrine. Simply because it is an arsenal plane, just like the F-15 and F/A-18. It has the aerodynamics and power necessary for a Hi-Hi combat doctrine. The only thing missing for it is stealth.
My guess about Azm is based on what I think it should be, to meet these evolving doctrinal goals. A single engined WS-10 / WS-15 based aircraft is possible, broadly along the lines of the F-22 conventional design layout, but a single engine design.
You could have recessed weapons. The last aircraft that experimented with recessed weapons was the Tornado. The recessed weapon station gives some stealth when weapons are loaded. However, if the missile dimensions change, then the effectiveness of the recessed station decreases or can even become unusable.
Another problem with recessed stations is that when the weapon is released, the space that is left exposed is a major RCS contributor, drastically increasing RCS.
An alternative also is possible with a hybrid recessed station and an internal bay. Yet another alternative is to go for a very small weapons bay that can only hold 2 PL-15s, and a single PL-10.
With a laser, some stealth yet not fully stealthy, a laser gun, FBL, aerodynamics designed for Hi-Hi, one could claim this to be 5.5 Gen. It wouldn't need an air conditioned hangar, and will not cost 5 times the maintenance cost of a 4th Gen. I think, 5.5 Gen could, if it follows this path, be called "practical stealth & lasers".