I didn't use them either, but primarily because I can't use most of them. I have a mac, so FMRTE won't work. My game editor doesn't work either and I don't want to use the genie scout
Only time I've used the proper editor, is just to create a team to use in the league which I'm managing now, and just let the computer produce the players for me. Never use FMRTE or anything else though, ever
I used the editor to make my own leagues or different cup comps but never to better my team it takes the fun away I mean everyone can win the Premier League with Barnet if you give them millions and great players!!
I use the editor before i start a new game just to check everything. I update the game myself i.e during the transfer window etc. Never used FMRTE though and proberly will never bother.
I use the official editor to change kits, change team nicknames, and change awful conflicting colors for the teams text bar. (white on white = unreadable)