45v45 is an ideal size for serious war clans. It allows the most xp available while preserving opt-out functionality.
50v50 can't have any one opted out, so while that's fine for casual clans, your more war orientated clashers are going to have people move to a different clan when heroes are upgrading.
There are issues with members going to a "parking lot" clan, the exact problems the opt out feature did away with. Losing members permenantly, the logistics of shuffling and communicating, and losing donation stats that potential recruits often look at.
And there's a special case, the leader. If he has to sit out that will force 10 people to be benched. 10 people, that's huge. The leader of a clan is often one of the most advanced accounts, covering his attacks is not typically a trivial concern. So if he is upgrading a hero, or god forbid the spell factory that's a huge problem.
Get rid of the 10 and 15 man wars instead, it byasses all these problems, still increases the pool of potential matches, and the only burden is kept away from the players who are the most war orientated.
And one last suggestion to help avoid snafus like this in the future: have a liason from supercell to stay in contact with some of the more successful clans. Our clans have more people than supercell has employees. I see this and think "omg do they even play their own game what are they thinking" (no offense), but removing 45v45 shouldn't have ever been seriously considered. It's worse than th8 elixir walls, as the issues should be obvious.
I wanted to add this excellent idea to the first post:
That would certainly be a workable solution. I believe it's on the banned ideas list, but in a different context--and not like banned ideas haven't been implemented before.



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