The Baron or any combat plane, as I have made a few, will fly fast. The small wing and stabilizers have a minimal drag profile to the oncoming air so they do have very fast capabilities, plus the wings and coupling being short they will roll and pitch very easily, hence why they are good for combat, super maneuverable.
What I found though that is if you put the CG a little further back, by say just a half inch, these combat planes will make good solid trainers too. You said you have your battery almost all the way to the front of the pod, move that back some until the CG is a centimeter or so back from where it is now and fly at around 50-60% throttle only. just to slow things down. If you punch it, it will pitch up of course, but this will give you a higher angle of attack on your wing and create more drag to help keep the plane slower. It will look and feel weird at first but if you get used to it, it will help you practice for coordinated landings as well.
Another thing is you could probably afford to dial the rates on your control surfaces down as well, and add some expo. I have found that on all the combat planes I have built, just for fun flying around I keep it on low rates. Again the short coupling and short wing span on large control surfaces you don't need much to coordinate the plane. All you need would be 1-1.5 thickness of FB of throw from center to control the plane. That's plenty for training. You can even adjust this either with your programming in your Tx or mechanically at your servos by connecting your pushrods closer to the servo on the servo arm and further out on the control horn.
Do you use dual rates and expo?