My kite was in the water a lot on the weekend as I was having trouble re-launching the 17m. Normally the lines would be packed full of seaweed but it wasn't anywhere near as bad as last year.
Last year you pretty much guaranteed a clump of weed on your lines if you dropped your kite. This year seems better but it is likely all dependent on how fast the tide is moving and how fast you are being dragged. The best answer is to not drop your kite