Congratulations on the fat loss. I think you’ll benefit a lot from eating your meals rather than drinking them.
The added fibre plus the extra energy it takes to digest the meals will give you a bit more wriggle room.
I’d do in phases, like this:
Week 1-3: drop morning shake/milk. Replace with veggie and bacon omlette. Keep the rest
Week 3-6: drop the dinner shake/milk. Replace with steak/fish, salad or roast/steamed veggies and rice or potatoes
Week 6-9: drop afternoon shake/milk. Replace with salad and tuna (with dressing).
Week 10+: final shake is alright but you may want to have yoghurt, nuts and fruit instead.
Or similar setup with foods you enjoy. I think this will put you miles ahead of swapping milk for salad.
This will be least disruptive to your current habits and give you the best chance of success.
All that said, I’d expect weight loss to occur if you swapped all your milk for salad but I don’t know how great nutritionally that is.