Its probably better than the G-3 which is why its replacing it but imo it can't be much better just like you said except for the fact that it has rails and a telescoping stock.
Turkey will be using a rifle that was designed in the 20th century and later modified by MKEK and Kale to operate in the 21st century. Average joes on the street will look at Turkish soldiers thinking that they are using the "american rifle", this gives Turkey a negative image and makes it look like a dependent country instead of the strong independent country it wishes to portray itself as.Hopefully people will get tricked with the carrying handle and grip thingy in front of the magazine area and think its a 100% turkish design.
In 10-15 years many countries will have futuristic looking bullpups or other advanced rifles when turkish troops will still be walking around with AR's.
This is a failed program imo. Money was put into a national infantry rifle project and the end result is a modified AR-10.