I do use an addon to customize and move the standard target, targettarget and party frames, but i see lots of ppl who do use the standard frames, in which u can only see 20(?) buffs with those shown first which were added first. So in most cases, u can only see buffs like housemaids, haidon, guild castle buffs, pet-buffs, etc. in your target, since there are a lot of them to use nowadays.
So especially for supporters and healers but i think for everyone as well it would be helpful, if the order of the shown buffs were inverted (and mb the maximum of 20(?) increased), so that u can see the shortest time remaining or last added buffs first.
I think its more useful to see if a tank is using some short-term def-skills than to be able to check if she/he uses def or hp buffs from housemaids - or to see if a dps is using her/his 5er or potions atm and not just seeing the remaining time of her/his housemaids, haidon or pets buffs