Hi Bianca, I have just seen your post. I personally think the best answer to your question will depend on a few other considerations because it really depends on the kitchen layout as a whole. Considerations may include; how will this affect the work flow in your Kitchen and what are the alternative positions available to you? Importantly; how big is your island going to be; an Island can be a great space for food preparation, meal plating, as well as the island being a social space for family as well as when entertaining. When placing the Sink in an island you may consider a sink also needs adequate additional space each side of it for the various functions it is used for; whereby placing a sink in a small Island can sometimes take away from the other benefits it provides. There is actually no clear yes or no answer, but to consider your Kitchen layout, appliance placements and its work flow as a whole. With the other things you have already mentioned here, I hope this extra helps in your decision process.

what happened to the old column? i think you need to add a corner cabinet (900 on the stove wall and 1050 on the sink wall) with doors hinged across the corner provides 300 + 450 wide doors and better access to the corner for storage of big appliances and to allow more space for the drawers to open, the 1000 fridge space allows an air gap and two 750 wide drawers next to the 900 wide stove, i've kept the 1200 gap between benches and island and added a cabinet (opening toward the sink allows for a 600 wide 450 deep space for a bin) then two 750 wide drawers and the built in microwave making a longer island and extra drawers next to the dishwasher ...in my experience, if you're having custom made cabinets you only need to specify the size of appliances and sink, the general layout of the room and your preferred arrangements and approximate sizes and the cabinet maker should measure the site and custom make the cabinets to suit the space with minor alteration to allow for any obstacles eg like making the pantry cabinets narrower to allow for architraves around the entry door..and it's more comfortable to walk around if the pantry doesn't overlap the architrave or encroach on the doorway

Also if i can avoid moving air con for now that would be great. The next phase of reno will be to take down the wall between lounges and put aircon on the front wall of the lounge as it's the only other outside wall it can go on. Here might be my plan for now. I'll put the kitchen in place and figure out if i need to add more storage to office area. Will add range hood and a few long open shelves like in the image below (and is also the look i'm going for decor wise)

If you still plan on a 900 deep with 300 being overhang the curve will only apply to the 300 depth so if you look at your plan and draw the rounded edge you will see it will be small. https://www.houzz.com.au/discussions/6351101/is-3-2m-kitchen-bench-workable-for-our-layout