Stanron - I did consider that as an option but still thought the 2/4+4/4 captured it better. Listen to the phrasing of the clarinet the 2nd time through.
(When I was playing in a classical guitar quartet I had to play a piece that went 5/8 5/8 4/8 6/8 for a lot of it, so I don't mind the changing time sigs!)
Mick