Yes, you're not the only one to agree. There are also a bunch of Clashers here who do not like having members leave during Wars. And just because I said "you're not the only one to agree" doesn't mean I'm one of them, I said it because I know a lot of Leaders and Co-Leaders who hated those.
Finally, it's a no. It's not gonna happen in the game. No, why? Reasons why:
- Feeder Clans
- The Leader temporarily leaves the main Clan to visit a feeder Clan and check on something. But to do that, the Leader has to wait 24-48 hours to get into the feeder and back to the main Clan.
- RAL (Request and Leave) Clans
- As the clan's name suggests: Request AND Leave. One joins, requests for troops, then leaves to get back to his/her main Clan. But to get into one after leaving, they have to wait 24-48 hours and another 24-48 hours to get back into the main Clan, which the other clanmates of the main clan thinks s/he left forever.
- Merged (or Allied) Clans
- A trusted member leaves the clan and visits the merged/allied clan. In order to do this, the player waits for 24-48 hours to get in and back, in which the player's clanmates in the other clan may think s/he has deserted the clan.
Now you know the reasons why I disagree?