It’s hard to criticize fun planes like the Lake and Mountain Skippers, especially at the sweet price of FREE, but…
I do wish the Lake variant had more uphill power when in ground effect. Despite its ability to climb, it loses a lot of oomph going up just a hundred feet (while still hugging the ground), meaning specially designed race and obstacle courses need to be nearly flat or downhill.
The other issue is collisions. The Lake Skipper hits its bottom on objects that other planes don’t hit. I am clearing obstacles by a good 10 feet but the Skipper still registers a hit and sprays water (even if the obstacle is a rock or race course hoop). It’s demonstrable.
And can we get lights? Flood lights so we can do night flying low to the ground. And maybe a torch so other pilots can follow us. Those are wish list items, not a complaint. 
I’ve put over 20 hours in the Lake Skipper since its release! 