Flying in wind can certainly lead to some extra work load. Not much you can do about roll and yaw effects due to side gusts from turbulence. But you can reduce your workload at maintaining the pitch axis if you trim the CG closer to the neutral stability point and re-trim the elevator to match the new CG. But while getting closer to neutral is good in some ways it's bad in others. So you'll want to find your own "sweet spot" for calming the effects of wind gusts vs having enough pitch stability for you to fly comfortably. I find that having the CG back even with a reduced elevator throw tends to make the model respond in a somewhat instant and nervous sort of way compared to a more trainer like CG setting. So a touch harder to fly smoothly and in a scale like manner. Perhaps some expo in addition to the reduced throw could aid with smoothing out the reaction to smaller inputs? That's something you'd want to play with. Also for flying in wind if you can SLIGHTLY reflex the ailerons and flaps to remove a bit of the airfoil's camber it might help too.

Adding weight won't really help any of these things. Increasing the wing loading is all about flying faster when it comes to gliders. Even your Fournier. But if that takes it away from looking scale like in the air then I don't see it as being an advantage. And scale models tend to already be fairly heavy. And that would seem to hold true here as well based on what Mick Reeve posted to Appowner above. And due to that it would be my last option after playing with setting the pitch trim to a value that gave me comfortable pitch handling and perhaps trying that reflexing trick. And, of course, lots of practice to learn to fly it in a manner that makes it look as scale like as practical.