from your first post concerns:
mosaic in corner is poor and should be corrected;
the two
tile wide wall probably looks better as two tiles rather than a centre full
tile and two equal size (slightly bigger than half
tile) cuts. New architrave slightly wider or moved over is a possible fix to loose the wide grout joint;
Wrong size trim is not acceptable If it causing overhangs/lipping;
Sharpe corners on trim (or anywhere) are not acceptable;
unsightly gaps in trim joints should not occur.
Changing the trim will be difficult as the tiles under it will probably need taking off (they would if I'd fixed it). I also note that the way the trim is fixed around the window is not the way I'd expect most professionals to do it - well the ones I've worked with but others may disagree.
Its funny how the plasterer says a bit of wall does not need flattening but then when it comes to HIM tiling it then its not flat enough to
tile without dot and dabbing!