the Mini is a great-handling little carbine for pointed/aimed fire; the AK feels clumsy by comparison
This is still a matter of opinion and what your used to. While you find it isnt, I find the AK to be more of what you think the Mini is, and across a more broad spectrum.
The Mini carries and racks more easily, since it's a lot sleeker and doesn't stick out in all directions.
Again, thats your opinion. I find the AK easier to carry and use (the basic sling set up is better) and charging the gun is no different.
As far as "poking out in all directions", there is little difference if the Mini is wearing a large capacity mag. The AK's pistol grip gives more options in the way its carried and shouldered than the Mini, and allows for a more compact weapon in that sense.
I really dont know how you can improve the AK's handling. Contrary to what many will tell you, the stock isnt to short, and the controls are not difficult to use. You can easily operate all aspects of the gun without ever removing your hand from the grip, and in some cases, you can get it in action quicker from comfortable carry positions, where your hand isnt on the grip, that you would not be able to do with most others due to the placement of their supposedly more ergonomic controls. Also, most of the more current AK's have their slings set up properly for carrying the gun in a more realistic fashion, and the slings are simple and dont tend to hang up on things. The Russian slings in particular, are very well made, quickly adjustable, and long enough to be used in most configurations the three point slings are supposed to excel at.
There is one thing that will bring both the Mini and the AK into the 21 century with the other more modernized platforms, and that is the Ultimak hand guard rail. It, along with a quality, low mounted red dot, will allow them both to keep up with the so called "better" guns. Other than that addition, the AK really needs nothing else, and even that really isnt necessary, but it is a major improvement.
The one thing that would improve the Minis usefulness would be the factory AC556F folding stock. It would give you the same sling set up and carry options as the AK, and also give you a more compact package, like the AK folders. Of course, like the wire stock AK folders (the AK100 series full stock folders aside) and most others folders, you may not find them as comfortable to shoot a lot with.