While there were days when I managed to sack 100+ coins. Most days I probably was only in 3 gyms.
I would venture to say that most people are probably averaging more coins now, than they were pre-gym rework.
Also the fact that it is maxed out at 50, makes the gyms approachable by other players, as there isn't a huge benefit for.
More people playing the game is what we need... not just the few that play all day and monopolize gyms with 6 Blissey. That wasn't fun for anyone.