Yes, you'll certainly notice some changes, mainly along the beach and of course the new jetty which is (by the looks of recent pictures posted) pretty much finished.
It's still the same
Icmeler that we all love though - still as friendly and welcoming as ever!
Early May can be a little mixed, I went out on 12th May last year and had 1 full day of sun and the rest was cloudy with sunny spells

though I gather it got better when we left!! It can get a little chilly in the night but it really depends where you are and which way the wind is blowing(!) just be prepared and either buy a pashmina when you get there or take a cardigan. Oh and the sea will be blimmin cold!!!
I'm going a week later this May so fingers crossed it'll be blue skies and high temps all the way (I'm already doing my sun dance!)
Mazz