tile replacement

We recently discovered our toilet was leaking underneath. We removed the toilet and hired a tile guy to repair the sub floor and install new tile. However, when I inspected the floor install, I see the tile is about half an inch ABOVE the toilet flange and is not cut round to surround it...

My best access to the faucet/filler plumbing of my bathtub was through the wall of the adjacent shower stall. That wall is tiled with large 12 x 24 ceramic tiles. I was successful in cutting out one complete tile and its substrate (something similar to Durock) without damaging surrounding...