Thanks for the advice guys.
Sent to my local GC and picked up some nice plants which will cover the edges, I bought red clover and some creeping Jenny. I've also got some water forget me nit's on the way.
I'd rather not have to adjust the liner but I have got some larger rocks and some more pebbles on the way to make a second 'beach' near the log pile. I've fixed the hole in the liner now as well so I can fill the pond some more.