freitasm:
Air New Zealand is a good example, removing the Space+ seats from domestic and Trans-Tasman flights this year. If you don't know the Space+ seats were the first six or so rows with an extra three inches legroom, usually reserved for people with Gold status or Koru members who remembered to select seats online (or at the airport when available).
I used those all the time, shame it's gone now.
I flew Air NZ to Melbourne a few months ago on a full economy fare and got the Space+ seats which were great. I've just got back from another trip to Melbourne and again was a full economy fare but couldn't choose a seat in the first six rows which sucked big time. I was in row 8 and row 9 respectively and they were normal seats. I'm pretty sure the first six rows have more leg room but they aren't called Space+ any more. To make matters worse the new entertainment system seemed to have half the selection that it used to have and there were quite a few of the same movies and TV show episodes that they had when I last flew. The service was great as usual, but the rest of my Air NZ experience was disappointing and seemed like a step backwards.