1) Does the GJ-11 use the RD-33? The prototype sure look it did. Will this be replaced with a new engine like the WS-19?
2) Why are all UCAVs either for recon or strike missions? Why hasnt any country come up with an UCAV purely for air to air combat?
Don't forget Russia also has "Hunter" which is going to be multirole and A2A proficient. However Hunter UCAV looks similar in layout to Lijian/ GJ-11 and all the American experimental flying wing UCAVs, except much larger with a lot more thrust and kinematic performance. Actually GJ-11 is pretty big as well but Anjian looks almost heavy fighter sized and the mockups seem to indicate a long coupled canard.
The main reason A2A UCAVs are not prolific now is because they suck against fighters still. The network capabilities are more jammable because there are more ways to disrupt control. Iran was capable of remotely controlling at least one US drone in the past if that is to be believed. In any case, it's definitely more possible to attack the network successfully and present more problems compared to a manned fighter. Situational awareness also wouldn't be quite as good. This has only recently changed like surrounding cameras helping pilots as one example. Signals to and from drones are also slightly delayed and that fraction of a second or more (depending how far away the drone is and the signal processing ability e.g. diff between 3G and 5G) is a huge difference even in BVR fights where you need to react to change instantly. It's all just going to devalue the effectiveness of the platform but things are slowly changing. Communications tech is allowing the delay to approach its physical limit (light speed) and narrow AI can assist in decision making and movement. Maybe all the pilot will be required to do is permit, select, and execute AI suggestions.
This is why air superiority UCAVs have not quite entered service yet but certainly will be soon. It coincides with improvements in telecommunication technologies like 5G as an example of a commercial element. Also other factors like software and the improving capability of electronics, sensor fusion, and other peripheral equipment. Once all the ingredients are properly combined and mature, UCAVs are going to dominate manned fighters in A2A... and only then.