I agree that kit seats are basically at the edge of being useless and resin seats are not to be beaten for look and scale detail
However here in South Africa they are not as readly available and have to be ordered from overseas making them rather expensive
I had to learn to dress up the kit seats with lead foil and in the case of my 1/48 Academy F4b I used tamiya tape for the belts.
on my 1/32 Hawk I used epoxy putty to make the seats more "buky" and again used tape for belts
On my 1/48 F15 I used tissue paper mixed with PVA glue on the seat to look like a wrinkled seat cover
These will never compare to a resin AM seat but with a little effort you can make something that will look a little better than the stock kit seat.
Theuns