1/ at the old place we had similar configuration to your drawing..the cooktop where that is and 2 slim windows on either side. 2/ wash up like drawing is preferred as can talk or watch TV. So sink inside 3/ wall oven and microwave on top at end below is photo of our old kitchen

i suggest that most of the time that the slide and hide option will mostly be used for cleaning?? we have built in microwave above and main oven below because we decided that the biggest and heaviest dishes would go in the lower oven and that would be safer to manage when lifting in and out...the microwave is at eye level and the bottom of the main oven is about 40cm off the floor allowing for a deep saucepan drawer underneath and cabinets with vertical dividers above the microwave for cake coolers, pizza pans and biscuit baking trays etc we're very happy with our choice

I want to do the same to free up a ‘stretch’ of bench space, rather than having only small work areas in the corner and ends of our small L shape. I am talking stove top only as oven will be in a tower with microwave. That means the cupboard underneath can utilise the whole space, albeit with relatively small door (430mm). We would have to offset the range hood on the adjacent wall due to window position but have been advised the modern hoods are powerful enough to extract steam without necessarily being positioned absolutely over the hot plates.

.I would always put fridge where it is accessible without getting into the main cooking zone and group oven and stove . Extend island to balance cooking zone, and reduce wasted space I would still delete the door to utility it really is wasting space and entering it via the hallway isn’t that big a deal anyway, for the compromise you are making and lost storage in the kitchen.