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looks good, I'm not a fan of utility rooms, but I've never had one, so take my opinion with a pinch of salt.
I had one when growing up and it was very useful. Basically all the stuff that you don't want to do in the kitchen like cleaning boots, coming home muddy/wet, somewhere to put a pram, umbrellas, etc and more cupboard space in the kitchen as dishwasher, washing machine and the rest can go in there.
A lot of those are dependent on having an outside door which it looks like it does on the plans.
Admittedly this was up north (hence being able to have a utility room) so I spent a lot more time wet and muddy.
The coloured one has the existing and the other is the reconfigured layout but with a smaller utility and downstairs shower.