I had a contra 17m, and it made me declare to never buy such a big kite again. Until I tested a Fat Lady. Wow. Way much more fun.
BUT, the fat lady is lighter, gentler, faster, but not more powerful. Probably slightly less powerful in my opinion, but with much better top end, much more maneuverability, much lighter so it stays in the air in lighter wind.
My solution was to get a race board. By far the best light wind investment. Now I use a 14 kite and get much better low end than on my 17m contra with twin tip.
This is what many discovers and works excellent IMO, because you get more "fun" into the game now full time, and can also take your smaller board if the wind picks up, where you with a huge kite would typically just ride the session out with too big clumsy overpowered kite
I think that if you are heavy, a big kite with low AR will work fine, and you got easy relaunch.
If you are lighter, you can go for a higher AR kite for light wind - in order to get better upwind ability and jumping, as you can not relaunch in super light wind anyway