My take on this, having sizes on my 7 wings from 520 to 1200 cm2 both low and high AR:
The smaller the wing, the more lively it is, period.
The lower AR, the more lively it is when bigger sizes.
The bigger it is, the tighter you can carve, for two reasons, more lift, and lower speed.
And again, bigger wings with lower AR, the more lively.
A small wing which is lively feels "good" somehow IMO, but the speed it needs will kill the narrow turn.
A big wing with low AR feels okay lively (not as much as the smaller ones though), and can turn narrow - so a good, the best, compromise for turning tight.
A big wing high AR is not as lively, but it can still turn really tight in my experience, as once you have initiated the turn, it goes just as tight.
Remember the "Yaw" input when turning, this is essential the bigger the wing and the higher the span, it changes the turn dramatically to the "tighter".
Dont drive harder, if your problems is line tensioning - use your hips as you say
In more wind you can drive as hard as you like, and also use a smaller more lively wing if you like, but in lighter stuff where these big sizes are used a lot, initiate with the yaw impulse.
So yes, a bigger wing turns slower, particularly if higher span (AR).
But slower turning does not mean bigger turn radius, on the contrary, that is the paradox if this makes sense?