And then we'll be back where we started from, with people ranting that they don't even get 1 hour because the rival team knocked them out (which is why we ended up in the 1 coin per 10 mins but 50 coins daily in the first place).
I really have no idea how and if they're going to solve this. I suggested having a recall ability after 8 hours, so that players can call their mons back. But then there might be a problem with that, such as players recalling and then instantly replacing with a brand new 3K Blissey, thus making it harder for anyone to break the gym down. Probably could be countered by making it locked for 10 minutes until next person on the team can replace the retired mon.
Many people here were saying they'd want an incentive for attacking, so collecting 50 coins via attacking would make opposite teams attack. But as someone around here said, that idea won't work for areas dominated by one team and double-account people could keep replacing themselves.
So... how is this going to be solved?
I think the instant 10 coins per gym owning was the only thing keeping people attacking.