Ah this nonsense again, please stop pretending you know what you're talking about. Neither engine is better than the other, they both excel in different areas. Unity is probably the better engine for what Graal 3D is trying to achieve although Unreal would also be a great choice.
Blueprints are amazing and make life so much easier but they're no substitute for scripting. You'd definitely struggle to create good quality games using them exclusively, especially when creating an MMO from the ground up. Some stuff just requires code. The Unity store has some great visual scripting and while not as powerful as blueprints can definitely improve workflow.
Unity is cheaper than Unreal for large companies. Unreal take a 5% cut on all revenue after $3000/month. Unity takes no cut and a professional licence costs $150 a month ($25 if revenue is less than 200k/year). Unreal might be cheaper for small games, but for large organisations Unity generally is.
I don't know what you mean exactly by "graphically more stable" but yes, Unreal is without a doubt better at delivering high-end visuals and offers a lot of tools which aid in this. Is Graal 3D going to utilize any of that? Looking at the Instagram post, probably not. For games which have fairly basic graphics, Unity is generally more efficient and offers better performance - particularly on mobile.
I very much doubt Graal, or any other professional developers are going to use free assets from other games so I don't think that would really matter.
Are you really trying to pin problems with the servers and bugs in the games code on the game engine? The engines aren't causing ****ty code or bad server architecture/infrastructure. Please do some research, you'll find very few people agree with what you're saying.
Sits down and prepares to argue
Outdone by someone who actually knows what they are talking about
Better luck next time, me.